Permission Problem - How to diagnose and fix?

PhotoStructure Plus on Windows 10

Edition Windows 10 Pro
Version 21H1
Installed on ‎3/‎21/‎2022
OS build 19043.1586
Experience Windows Feature Experience Pack 120.2212.4170.0

On starting PhotoStructure, I get a message pop-up. See attached screen grab. I’d like to know what the issue is, and how to fix it. Thanks.

Is F:\ your CD-ROM drive?

No… It’s a Seagate 8TB External (USB) backup drive. It is also the home of my PhotoStructure library.

Wait a minute… belay that.

Yes… F: is the CD-ROM drive. (I just had a senior moment…)

I’ll look into CD-ROM support as soon as I release the alpha of v2.1. Until then, I’m afraid you’ll need to unmount your CD-ROM before you launch PhotoStructure.

I’ll get this fixed as soon as I can!