Program stops opening and my cure

A couple of weeks ago I downloaded a trial version of Toon Boom Studio 4.5. After trying it out for a few days I bought and downloaded the full version. All went well for about 6 days after that, when suddenly I could not open the program (Nor even the 3.5 version which I had retained.) I tried all manner of work-arounds but none of them worked. Out of desperation I re-installed the trial version and now both the full 4.5 version and the 3.5 version work OK again.

Un-installing and re-installing usually does the trick for software conflicts.
Well done! romi