Since it seems orphaned, it'd be nice if they post the source to Github so maybe the project could be brought back to life. I've had a registered copy for years but an interface upgrade would be nice. I got it when I had Windows95 and now on Windows 11.
I've been using WhereIsIt for at least 12 years & it is awesome at its primary mission of allowing you to search your files & folders on media that aren't physically connected or present. This is truly a great program & it is hard to imagine why this isn't maintained or updated any longer (at least since 2014) since it's such an awesome product w/ fantastic reviews across many sites.
I am a personal user
https://github.com/PJDude/librer