Sorry for that but V1.3.3.17 had a small but annoying bug (lost of main window position when exited). The new V1.3.3.18 fixes this problem. Get it here..
Sentence to think about : Slow and methodical testing like this will eventually get you to a point where you will either be able to spot the bug, or go quietly insane. Maybe both. Persistence of Vision 2.1 software documentation.