I’m sorry my previous posts didn’t explain this well enough. Here are the steps I take to replicate my error:

1. Start with the default movie as set when the program opens.
2. Select the text tool.
3. Click somewhere within your work area. Text dialog window opens.
4. Type “Hi” without the quotes.
5. Click OK to close text window.
6. Make new frames (10 total) by clicking the + (Plus) button on the bottom toolbar.
7. Delete frame 10 by clicking the – (Minus) button on the bottom toolbar. (Now I have 9 frames).
8. Click YES on the popup window.
9. Delete any other frame using the – button again, let’s choose the last frame (9).
10. Click YES on the popup window.
11. Crash… Koolmoves has encountered an error and needs to close.

Basically what happens is when I delete a frame then delete another frame the program crashes (Also it doesn't have to be right after adding frames, it can happen anytime). I have had many other crashes in using the program but this one is the only one I have taken the time to recreate.