Thanks again, eschwartz. Clicked on "Yes" and got this error message after the restore reached 100%:
Code:
calibre, version 2.26.0
ERROR: Failed: Restoring database failed, click Show details to see details
Traceback (most recent call last):
File "site-packages\calibre\db\restore.py", line 125, in run
File "site-packages\calibre\db\restore.py", line 277, in replace_db
WindowsError: [Error 32] The process cannot access the file because it is being used by another process: u'C:\\Users\\John\\Documents\\Calibre Library\\metadata.db'