@jonas That seems to have done the trick! Thank you!

Hey, I'm I a bit of a noob with this stuff - What was it in the above screencap that told you it might be a permissions issue?

Using version 1.0.18 on MacOS. I can't seem to play my files anymore - When I click on a song I get this "Operation not permitted" alert, and then the player crashes after a few seconds. Any idea what's going on here?