Application crashes consistently @ 99%

Intel based PC, 3 GHz, 4 gb RAM, Windows XP SP3.

When attempting to remove commercials from a 1 hour AVI of a TV show, after marking all of the desired cuts, then clicking the "TRIM" button, it gets to 99%
saving the edited file, then crashes. The resulting file after the incomplete save does not play at all. In troubleshooting, I've tried different WMV and AVI short video files and the result is the same.... it lets me mark segments for removal, but attempting to save the result always crashes at 99%.