Program installed multiple times - show locations of each

[Rassi]

I apparently have several installations on my PC of a couple of programs.  I have multiple hard drives.  One program is Mozilla Thunderbird.  One version appears to be the latest, the other version slightly older.  I cannot find where the associated directory is located for the older version.  How can I find it? 

There was a thread from 2021 asking this question, but the solution was how to display the directories in the Windows Uninstall process, not in Patch My PC.  That's where I want to see the directories that programs are located.

Thanks!