diff --git a/build.gradle b/build.gradle
index af5789f..af10be2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -61,6 +61,17 @@ jar {
     }
 }
 
+task processAssets(type: Copy) {
+    from('src') {
+        include 'assets/**/*.png'
+        include 'Ic2ExpReactorPlanner/Bundle*.properties'
+    }
+    into 'build/classes/java/main'
+}
+
+run {
+    run.dependsOn processAssets
+}
 
 task processSource(type: Copy) {
     from sourceSets.main.java
diff --git a/src/Ic2ExpReactorPlanner/Reactor.java b/src/Ic2ExpReactorPlanner/Reactor.java
index e834fd1..1ee01b1 100644
--- a/src/Ic2ExpReactorPlanner/Reactor.java
+++ b/src/Ic2ExpReactorPlanner/Reactor.java
@@ -496,6 +496,10 @@ private void readCodeString(final String code) {
         BigintStorage storage = BigintStorage.inputBase64(code);
         // read the code revision from the code itself instead of making it part of the prefix.
         int codeRevision = storage.extract(255);
+        // Check if the code revision is supported yet.
+        if (codeRevision > 1) {
+            throw new IllegalArgumentException("Unsupported code revision in reactor code.");
+        }
         // for code revision 1 or newer, read whether the reactor is pulsed and/or automated next.
         if (codeRevision >= 1) {
             pulsed = storage.extract(1) > 0;
diff --git a/src/Ic2ExpReactorPlanner/ReactorPlannerFrame.java b/src/Ic2ExpReactorPlanner/ReactorPlannerFrame.java
index 8069621..3a71458 100644
--- a/src/Ic2ExpReactorPlanner/ReactorPlannerFrame.java
+++ b/src/Ic2ExpReactorPlanner/ReactorPlannerFrame.java
@@ -45,6 +45,7 @@
 import javax.swing.JPanel;
 import javax.swing.SpinnerNumberModel;
 import javax.swing.SwingUtilities;
+import javax.swing.ToolTipManager;
 import javax.swing.border.BevelBorder;
 import javax.swing.event.DocumentEvent;
 import javax.swing.event.DocumentListener;
@@ -106,6 +107,7 @@ public class ReactorPlannerFrame extends javax.swing.JFrame {
      */
     public ReactorPlannerFrame() {
         initComponents();
+        ToolTipManager.sharedInstance().setDismissDelay((int)30e3);
         Enumeration<AbstractButton> buttons = componentsGroup.getElements();
         if (heatSpinner.getModel() instanceof SpinnerNumberModel) {
             heatSpinnerModel = (SpinnerNumberModel)heatSpinner.getModel();