Desktop Images not seen by PL 4 but OK with PL3?

I inadvertently said NO when asked if PL could see images on my Desktop. How fo I reverse this please. I am not totally lost as I still have PL3 but of course would like to get PL4 back to 100% working which it is not at the moment.

I have tried removing the programme and reinstalling it again but the question about desktop access was not shown.

iMac with plenty of memory it was my error.

maybe this helps…

Slept on it and this morning went into Preferences/Privacy and noted PL3 was ticked and PL4 was not.

Solved and happy again.

Many thanks to platypus, sadly my command of the German language is no longer good.