May be 5 years ago I had Pinnacle running at Win XP for quite a while. Nice Software. Then it became unstable. I had spent endless time for getting it running. Finally I removed it from my computer.   Now, years later, I think about purchasing it again. I search the reviews and it seems nothing has improved: There are tons of destructive ...

You are not the only one with this problem. It seems to be a serious bug in the SW which is present now for a long time. I have it at least since version 9.4.3.