diff --git a/CHANGES.md b/CHANGES.md
index 4bb2ae3..370e82c 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,8 +2,9 @@
 
 ### Version 0.2.2
 
+- Overloaded `NE0` / `NE1` for noise reset enable effect
 - Added SN76489 stereo separation to mixer menu
-- Added `NE0` / `NE1` noise reset enable effect
+- Re-added file association
 - SN76489 VGM logger now eliminates extra register writes that have no side effects
 - Extended VGM header size so that it will not be misinterpreted by certain players
 - Fixed text export and import (for SN7T only)
@@ -12,7 +13,7 @@
 
 ### Version 0.2.1
 
-- Overloaded `Nxx` for Game Gear stereo control
+- Overloaded `N00` - `N1F` for Game Gear stereo control
 - Channels no longer reduce to zero volume when the mixed volume is less than 0 (to match 0CC-FT's 5B behaviour)
 - Fixed arpeggio on noise channel now maps 0 to `L-#` and 2 to `H-#` **(backward-incompatible change, modify your modules accordingly)**
 - Fixed VGM logs putting 0 in the sample count fields
diff --git a/NOTES.md b/NOTES.md
index 8aa942a..1461f10 100644
--- a/NOTES.md
+++ b/NOTES.md
@@ -4,13 +4,23 @@
 
 ## Sound Chips
 
-#### Texas Instruments SN76489 (PSG)
+#### Texas Instruments SN76489
 
-_(TODO)_
+- Square channel, 4-bit volume, 10-bit pitch (x3)
+- Noise channel, 4-bit volume, 3 pitches or pitch follows channel 3, long/short periodic noise with phase reset (x1)
+
+###### Variants
+
+- _(TODO)_
+
+#### Game Gear (PSG)
+
+- Same as SN76489, except all channels have L/R hardpanning
 
 #### T6W28 (NGP)
 
-_(TODO)_
+- Square channel, 4-bit L/R volume, 10-bit pitch (x3)
+- Noise channel, 4-bit L/R volume, 10-bit pitch, long/short periodic noise with phase reset (x1)
 
 #### Yamaha YM2413 (OPLL)
 
@@ -56,6 +66,10 @@ _(TODO)_
 
 Under the **Tracker** menu is a new option called "Log VGM File...". Select it to save a VGM file, then play any song to start logging all audio events, and stop the player to finish logging.
 
+#### Stereo Separation
+
+The mixer menu can now configure the volume of each SN76489 output channel, as well as the stereo separation between them; 0% is effectively the same as mono audio, 100% is the default separation.
+
 ## Compatibility
 
 SnevenTracker modules (`.snm` files) share the same format with `.ftm` and `.0cc` files but are incompatible with them. Copying and pasting of frames and patterns still works across these trackers.
diff --git a/README.md b/README.md
index e904379..afe1478 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,6 @@
 # SnevenTracker
 
-SnevenTracker (SN76489 Tracker) is a fork of FamiTracker version 0.4.6 that
-emulates the Texas Instruments SN76489 sound chip, which is used in a wide
-variety of computers and gaming consoles. The project's ultimate aim is to
-implement multiple sound chips in a more modular manner than 0.4.6, in order to
-provide insight into eventually supporting them in
-[0CC-FamiTracker](https://github.com/HertzDevil/0CC-FamiTracker).
+SnevenTracker (SN76489 Tracker) is a fork of FamiTracker version 0.4.6 that emulates the Texas Instruments SN76489 sound chip, which is used in a wide variety of computers and gaming consoles. The project's ultimate aim is to support multiple sound chips in a more modular manner than 0.4.6, and then forward-port these changes to [0CC-FamiTracker](https://github.com/HertzDevil/0CC-FamiTracker).
 
 As in 0CC-FT, all changes to the source code are marked with `// // //`.
 
@@ -14,5 +9,5 @@ See `NOTES.md` for a brief overview of the stuffs actually added.
 ### To-do
 
 - Should support multiple master clock rates and both versions of the LFSR
-- Should support two instances of the SN76489, plus an extra sound chip
+- Should support all sound chips as described in the notes
 - KSS export is planned, but low priority
diff --git a/Source/FamiTracker.cpp b/Source/FamiTracker.cpp
index f0bef4a..e40d2be 100644
--- a/Source/FamiTracker.cpp
+++ b/Source/FamiTracker.cpp
@@ -203,7 +203,7 @@ BOOL CFamiTrackerApp::InitInstance()
 	// Skip this if in wip/beta mode
 #if /*!defined(WIP) &&*/ !defined(_DEBUG)
 	// Add shell options
-	// // // RegisterShellFileTypes(TRUE);
+	RegisterShellFileTypes(TRUE);
 	// Add an option to play files
 	CString strPathName, strTemp, strFileTypeId;
 	AfxGetModuleShortFileName(AfxGetInstanceHandle(), strPathName);