Hello to all of you:
Thanks for replying and I am sorry if I didn't explain things properly. First I'll answer your questions:
1. No, I wasn't forced to install the portable version - I have been using the portable version for a number of years now.
2. Yes, it is installed on a flash drive. I went to the portable version because I was tired of different versions installed on different machines and each one looked different. Once having said that, I almost never use Calibre on my desktop - only on my laptop!
Now I will attempt to describe what my Q: partition (on a flash drive) looks like.
Q: Calibre Portable and Libraries
-Calibre Portable
-Calibre.exe {the one just installed}
-app {folder with 4 subfolders: bin,plugins, resources, & translations}
>Calibre-Portable.exe {the previous one which is correct}
When I execute "Calibre-Portable.exe" everything works as before, but when I execute 'Calibre.exe', everything is lost. So, I guess the last question: Is it safe to delete the contents of the Calibre folder (contains the 4 folders above), rename 'Calibre-Portable.exe' to 'Calibre.exe' and run that?
By the way, when I install a new version, I install to simply 'Q:'.
Again, thanks to all of you for coming to my rescue. I don't think it would have occurred to me to see if the program was installed twice!
Sparky