PMU will not open?

Okay I didn’t know what to put this in but, I have a problem with opening PMU, when I click on the tab on the tool bar or my desktop it says “Pokemon Mystery Universe has stopped working” so what do I do? I need help.

Have you tried re-installing and seeing if that helps, or maybe right-clicking and selecting “Open as Administrator”?

same thing happens to me when i do it off the desktop and toolbar, instead go into the pmu folder and open it from there