Hey there, can you see if there is any log created in the folder:
C:\Users\~username~\AppData\LocalLow\JGames\Pic2Jelly\Crashes
Can you also try to run the app in windows mode to see if the problem is not in the resolution.
Finally, does the free version of the app work for you? If so, it can be some modification that happened in a later version and I will try to look into that.