I just had to reinstall Calibre on my newly cleaned laptop (thanks Leep for the help)......The Calibre Library was there, but only the Calibre icon showed. Apparently it was just a shortcut.
This time I actually watched the quick video....and I found it very informative and I must say, your instructions were easy to follow.
Installed latest version, chose my "Calibre Library" folder for destination, and voila!
Everything works perfectly.
'Whew. All my 943 books back. Carbonite is installed, and running beautifully.
More Karma to you,,,,,,