Rozy,
We are unaware of this exact problem, but would like to troubleshoot to see if it is a problem happening within the program or a corrupt video file.
1) Are you using the Mac or Windows version?
2) If Windows, when you import the video, does the chapter show a time or "0:00" for the time?
3) Since your first post, have you tried any other videos to see if dragging the last chapter into a workout causes a crash, or is it isolated to Kickmax?
Thanks!