I'm running the 30 day trial of PM+ and the program shuts down when I delete a folder and also if I close a contact sheet tab of filter tab. I can get it to happened repeatedly, If I have multiple tabs open it happens when only one tab is left open, for example if I have 5 tabs open I can close 4 of them, but when I close the last one the program shuts down. Also twice when I've deleted a folder it does the same thing and shuts down. The funny thing is if I look at the PM+ icon in the dock, it has the dot under it like its still running but the program is not showing up on my monitor, if I click the dock icon nothing happens, I have to right click on the icon and quit and then if I click the icon after quitting the program opens and runs fine, unless I delete all the tabs or delete a folder. I just tried deleting a folder in my copy of regular PM6 and it's shutting down too, I don't remember it doing that before. I recently updated my iMac to Big Sur not sure if that's causing the problem. Other than these issues, I really love PM+ and will probably upgrade.
Running iMac Late 2015
32gb on Big Sur