diff --git a/blakpyra.nv.json b/blakpyra.nv.json
index 72e15c3..4794035 100644
--- a/blakpyra.nv.json
+++ b/blakpyra.nv.json
@@ -11,44 +11,40 @@
   "_copyright": "Copyright (C) 2024 by Francis De Brabandere <francisdb@gmail.com>",
   "_license": "GNU Lesser General Public License v3.0",
   "_endian": "little",
+  "_nibble": "high",
   "_roms": [
     "blakpyra"
   ],
-  "_fileformat": 0.2,
+  "_fileformat": 0.4,
   "_version": 0.1,
   "game_state": {
     "credits": {
       "label": "Credits",
       "start": 61,
       "length": 2,
-      "encoding": "bcd",
-      "nibble": "high"
+      "encoding": "bcd"
     }
   },
   "last_game": [
     {
       "start": 72,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 79,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 86,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 93,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     }
   ],
   "high_scores": [
@@ -58,8 +54,7 @@
       "score": {
         "start": 166,
         "encoding": "bcd",
-        "length": 7,
-        "nibble": "high"
+        "length": 7
       }
     }
   ],
@@ -70,7 +65,6 @@
         "start": 173,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 40
       },
@@ -79,7 +73,6 @@
         "start": 180,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -88,7 +81,6 @@
         "start": 187,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -97,7 +89,6 @@
         "start": 194,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -106,7 +97,6 @@
         "start": 201,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -115,7 +105,6 @@
         "start": 208,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -124,7 +113,6 @@
         "start": 215,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -133,7 +121,6 @@
         "start": 222,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -142,7 +129,6 @@
         "start": 229,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -151,7 +137,6 @@
         "start": 236,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -160,7 +145,6 @@
         "start": 243,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       }
@@ -172,7 +156,6 @@
         "label": "Extra ball / Free game score level 1",
         "start": 146,
         "encoding": "bcd",
-        "nibble": "high",
         "length": 6,
         "min": 0,
         "max": 999000,
@@ -187,7 +170,6 @@
         "label": "Extra ball / Free game score level 2",
         "start": 152,
         "encoding": "bcd",
-        "nibble": "high",
         "length": 6,
         "min": 0,
         "max": 999000,
@@ -203,7 +185,6 @@
         "label": "Extra ball / Free game score level 3",
         "start": 158,
         "encoding": "bcd",
-        "nibble": "high",
         "length": 6,
         "min": 0,
         "max": 999000,
@@ -218,7 +199,6 @@
         "label": "High score to date",
         "start": 166,
         "encoding": "bcd",
-        "nibble": "high",
         "length": 7,
         "min": 0,
         "max": 9990000
diff --git a/bmx.nv.json b/bmx.nv.json
index 1f2e7d9..f3f83ac 100644
--- a/bmx.nv.json
+++ b/bmx.nv.json
@@ -10,44 +10,40 @@
   "_copyright": "Copyright (C) 2024 by Francis De Brabandere <francisdb@gmail.com>",
   "_license": "GNU Lesser General Public License v3.0",
   "_endian": "little",
+  "_nibble": "high",
   "_roms": [
     "bmx"
   ],
-  "_fileformat": 0.2,
+  "_fileformat": 0.4,
   "_version": 0.1,
   "game_state": {
     "credits": {
       "label": "Credits",
       "start": 61,
       "length": 2,
-      "encoding": "bcd",
-      "nibble": "high"
+      "encoding": "bcd"
     }
   },
   "last_game": [
     {
       "start": 72,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 79,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 86,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 93,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     }
   ],
   "high_scores": [
@@ -57,8 +53,7 @@
       "score": {
         "start": 166,
         "encoding": "bcd",
-        "length": 7,
-        "nibble": "high"
+        "length": 7
       }
     }
   ]
diff --git a/centaur.nv.json b/centaur.nv.json
index 5203c3b..1dd5a99 100644
--- a/centaur.nv.json
+++ b/centaur.nv.json
@@ -12,45 +12,41 @@
   "_copyright": "Copyright (C) 2024 by Francis De Brabandere <francisdb@gmail.com>",
   "_license": "GNU Lesser General Public License v3.0",
   "_endian": "little",
+  "_nibble": "high",
   "_roms": [
     "centaur",
     "centaura"
   ],
-  "_fileformat": 0.2,
+  "_fileformat": 0.4,
   "_version": 0.1,
   "game_state": {
     "credits": {
       "label": "Credits",
       "start": 61,
       "length": 2,
-      "encoding": "bcd",
-      "nibble": "high"
+      "encoding": "bcd"
     }
   },
   "last_game": [
     {
       "start": 72,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 79,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 86,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 93,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     }
   ],
   "high_scores": [
@@ -60,8 +56,7 @@
       "score": {
         "start": 166,
         "encoding": "bcd",
-        "length": 7,
-        "nibble": "high"
+        "length": 7
       }
     }
   ],
@@ -72,7 +67,6 @@
         "start": 173,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 40
       },
@@ -81,7 +75,6 @@
         "start": 180,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -90,7 +83,6 @@
         "start": 187,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -99,7 +91,6 @@
         "start": 194,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -108,7 +99,6 @@
         "start": 201,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -117,7 +107,6 @@
         "start": 208,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -126,7 +115,6 @@
         "start": 215,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -135,7 +123,6 @@
         "start": 222,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -144,7 +131,6 @@
         "start": 229,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -153,7 +139,6 @@
         "start": 236,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       },
@@ -162,7 +147,6 @@
         "start": 243,
         "length": 7,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 99999
       }
@@ -174,7 +158,6 @@
         "label": "Extra ball / Free game score level 1",
         "start": 146,
         "encoding": "bcd",
-        "nibble": "high",
         "length": 6,
         "min": 0,
         "max": 999000,
@@ -189,7 +172,6 @@
         "label": "Extra ball / Free game score level 2",
         "start": 152,
         "encoding": "bcd",
-        "nibble": "high",
         "length": 6,
         "min": 0,
         "max": 999000,
@@ -205,7 +187,6 @@
         "label": "Extra ball / Free game score level 3",
         "start": 158,
         "encoding": "bcd",
-        "nibble": "high",
         "length": 6,
         "min": 0,
         "max": 999000,
@@ -220,7 +201,6 @@
         "label": "High score to date",
         "start": 166,
         "encoding": "bcd",
-        "nibble": "high",
         "length": 7,
         "min": 0,
         "max": 9990000
@@ -232,7 +212,6 @@
         "start": 250,
         "length": 1,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 3,
         "special_values": {
@@ -247,7 +226,6 @@
         "start": 251,
         "length": 1,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 3,
         "special_values": {
@@ -262,7 +240,6 @@
         "start": 252,
         "length": 1,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 3
       },
@@ -271,7 +248,6 @@
         "start": 253,
         "length": 1,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 3,
         "special_values": {
@@ -286,7 +262,6 @@
         "start": 254,
         "length": 1,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 15
       },
@@ -295,7 +270,6 @@
         "start": 255,
         "length": 1,
         "encoding": "bcd",
-        "nibble": "high",
         "min": 0,
         "max": 15
       }
diff --git a/embryond.nv.json b/embryond.nv.json
index 62ccd1c..cf2c3d6 100644
--- a/embryond.nv.json
+++ b/embryond.nv.json
@@ -10,45 +10,41 @@
   "_copyright": "Copyright (C) 2024 by Francis De Brabandere <francisdb@gmail.com>",
   "_license": "GNU Lesser General Public License v3.0",
   "_endian": "little",
+  "_nibble": "high",
   "_roms": [
     "embryond",
     "embryon"
   ],
-  "_fileformat": 0.2,
+  "_fileformat": 0.4,
   "_version": 0.1,
   "game_state": {
     "credits": {
       "label": "Credits",
       "start": 61,
       "length": 2,
-      "encoding": "bcd",
-      "nibble": "high"
+      "encoding": "bcd"
     }
   },
   "last_game": [
     {
       "start": 72,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 79,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 86,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 93,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     }
   ],
   "high_scores": [
@@ -58,8 +54,7 @@
       "score": {
         "start": 166,
         "encoding": "bcd",
-        "length": 7,
-        "nibble": "high"
+        "length": 7
       }
     }
   ]
diff --git a/fathom.nv.json b/fathom.nv.json
index 33482ae..dbee9ad 100644
--- a/fathom.nv.json
+++ b/fathom.nv.json
@@ -10,44 +10,40 @@
   "_copyright": "Copyright (C) 2024 by Francis De Brabandere <francisdb@gmail.com>",
   "_license": "GNU Lesser General Public License v3.0",
   "_endian": "little",
+  "_nibble": "high",
   "_roms": [
     "fathom"
   ],
-  "_fileformat": 0.2,
+  "_fileformat": 0.4,
   "_version": 0.1,
   "game_state": {
     "credits": {
       "label": "Credits",
       "start": 61,
       "length": 2,
-      "encoding": "bcd",
-      "nibble": "high"
+      "encoding": "bcd"
     }
   },
   "last_game": [
     {
       "start": 72,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 79,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 86,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     },
     {
       "start": 93,
       "encoding": "bcd",
-      "length": 7,
-      "nibble": "high"
+      "length": 7
     }
   ],
   "high_scores": [
@@ -57,8 +53,7 @@
       "score": {
         "start": 166,
         "encoding": "bcd",
-        "length": 7,
-        "nibble": "high"
+        "length": 7
       }
     }
   ]
diff --git a/hglbtrtb.nv.json b/hglbtrtb.nv.json
index 050fd05..4ae5860 100644
--- a/hglbtrtb.nv.json
+++ b/hglbtrtb.nv.json
@@ -11,18 +11,18 @@
   "_copyright": "Copyright (C) 2024 by Francis De Brabandere <francisdb@gmail.com>",
   "_license": "GNU Lesser General Public License v3.0",
   "_endian": "little",
+  "_nibble": "high",
   "_roms": [
     "hglbtrtb"
   ],
-  "_fileformat": 0.2,
+  "_fileformat": 0.4,
   "_version": 0.1,
   "game_state": {
     "credits": {
       "label": "Credits",
       "start": 57,
       "length": 1,
-      "encoding": "bcd",
-      "nibble": "high"
+      "encoding": "bcd"
     }
   },
   "last_game": [
@@ -30,28 +30,24 @@
       "start": 61,
       "encoding": "bcd",
       "length": 6,
-      "nibble": "high",
       "scale": 10
     },
     {
       "start": 67,
       "encoding": "bcd",
       "length": 6,
-      "nibble": "high",
       "scale": 10
     },
     {
       "start": 73,
       "encoding": "bcd",
       "length": 6,
-      "nibble": "high",
       "scale": 10
     },
     {
       "start": 79,
       "encoding": "bcd",
       "length": 6,
-      "nibble": "high",
       "scale": 10
     }
   ],
@@ -63,7 +59,6 @@
         "start": 171,
         "encoding": "bcd",
         "length": 6,
-        "nibble": "high",
         "scale": 10
       }
     }
diff --git a/kissc.nv.json b/kissc.nv.json
index 6631ed7..ca5b48b 100644
--- a/kissc.nv.json
+++ b/kissc.nv.json
@@ -10,44 +10,40 @@
   "_copyright": "Copyright (C) 2024 by Francis De Brabandere <francisdb@gmail.com>",
   "_license": "GNU Lesser General Public License v3.0",
   "_endian": "little",
+  "_nibble": "high",
   "_roms": [
     "kissc"
   ],
-  "_fileformat": 0.2,
+  "_fileformat": 0.4,
   "_version": 0.1,
   "game_state": {
     "credits": {
       "label": "Credits",
       "start": 57,
       "length": 1,
-      "encoding": "bcd",
-      "nibble": "high"
+      "encoding": "bcd"
     }
   },
   "last_game": [
     {
       "start": 60,
       "encoding": "bcd",
-      "length": 6,
-      "nibble": "high"
+      "length": 6
     },
     {
       "start": 66,
       "encoding": "bcd",
-      "length": 6,
-      "nibble": "high"
+      "length": 6
     },
     {
       "start": 72,
       "encoding": "bcd",
-      "length": 6,
-      "nibble": "high"
+      "length": 6
     },
     {
       "start": 78,
       "encoding": "bcd",
-      "length": 6,
-      "nibble": "high"
+      "length": 6
     }
   ],
   "high_scores": [
@@ -57,8 +53,7 @@
       "score": {
         "start": 207,
         "encoding": "bcd",
-        "length": 6,
-        "nibble": "high"
+        "length": 6
       }
     }
   ]
diff --git a/paragon.nv.json b/paragon.nv.json
index e98c0fa..e4438ab 100644
--- a/paragon.nv.json
+++ b/paragon.nv.json
@@ -10,44 +10,40 @@
   "_copyright": "Copyright (C) 2024 by Francis De Brabandere <francisdb@gmail.com>",
   "_license": "GNU Lesser General Public License v3.0",
   "_endian": "little",
+  "_nibble": "high",
   "_roms": [
     "paragon"
   ],
-  "_fileformat": 0.2,
+  "_fileformat": 0.4,
   "_version": 0.1,
   "game_state": {
     "credits": {
       "label": "Credits",
       "start": 57,
       "length": 1,
-      "encoding": "bcd",
-      "nibble": "high"
+      "encoding": "bcd"
     }
   },
   "last_game": [
     {
       "start": 61,
       "encoding": "bcd",
-      "length": 6,
-      "nibble": "high"
+      "length": 6
     },
     {
       "start": 67,
       "encoding": "bcd",
-      "length": 6,
-      "nibble": "high"
+      "length": 6
     },
     {
       "start": 73,
       "encoding": "bcd",
-      "length": 6,
-      "nibble": "high"
+      "length": 6
     },
     {
       "start": 74,
       "encoding": "bcd",
-      "length": 6,
-      "nibble": "high"
+      "length": 6
     }
   ],
   "high_scores": [
@@ -57,8 +53,7 @@
       "score": {
         "start": 207,
         "encoding": "bcd",
-        "length": 6,
-        "nibble": "high"
+        "length": 6
       }
     }
   ]
diff --git a/startreb.nv.json b/startreb.nv.json
index 88cfb84..6b2dfb9 100644
--- a/startreb.nv.json
+++ b/startreb.nv.json
@@ -10,18 +10,18 @@
   "_copyright": "Copyright (C) 2024 by Francis De Brabandere <francisdb@gmail.com>",
   "_license": "GNU Lesser General Public License v3.0",
   "_endian": "little",
+  "_nibble": "high",
   "_roms": [
     "startreb"
   ],
-  "_fileformat": 0.2,
+  "_fileformat": 0.4,
   "_version": 0.1,
   "game_state": {
     "credits": {
       "label": "Credits",
       "start": 57,
       "length": 1,
-      "encoding": "bcd",
-      "nibble": "high"
+      "encoding": "bcd"
     }
   },
   "last_game": [
@@ -29,28 +29,24 @@
       "start": 60,
       "encoding": "bcd",
       "length": 6,
-      "nibble": "high",
       "scale": 10
     },
     {
       "start": 66,
       "encoding": "bcd",
       "length": 6,
-      "nibble": "high",
       "scale": 10
     },
     {
       "start": 72,
       "encoding": "bcd",
       "length": 6,
-      "nibble": "high",
       "scale": 10
     },
     {
       "start": 78,
       "encoding": "bcd",
       "length": 6,
-      "nibble": "high",
       "scale": 10
     }
   ],
@@ -62,7 +58,6 @@
         "start": 207,
         "encoding": "bcd",
         "length": 6,
-        "nibble": "high",
         "scale": 10
       }
     }