Permission Problem - How to diagnose and fix?

PhotoStructure Plus on Windows 10

Edition Windows 10 Pro
Version 21H1
Installed on โ€Ž3/โ€Ž21/โ€Ž2022
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. Iโ€™d like to know what the issue is, and how to fix it. Thanks.

Is F:\ your CD-ROM drive?

Noโ€ฆ Itโ€™s a Seagate 8TB External (USB) backup drive. It is also the home of my PhotoStructure library.

Wait a minuteโ€ฆ belay that.

Yesโ€ฆ F: is the CD-ROM drive. (I just had a senior momentโ€ฆ)

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

Iโ€™ll get this fixed as soon as I can!