Originally Posted by DoctorOhh
When at the New Location box click on the icon to the right of the empty box to navigate to your library's new location. See attached.
Yes, you can always return things back the way they were.
Appreciate your help. I have Calibre Library back again with the path: C:\users\Patrick\Dropbox\Calibre\Calibre Library. I preferred it as previously C:\users\Patrick\Calibre Library but guess it doesn't make much difference. I am sorry I ever got involved with Dropbox but I guess it is just because of my computer ignorance. Cheers.