Calibre 2.7 Unable to open Database file

Hi All. I've been trying to fix my daughters computer and hooked up her HD to my system to do diagnostics. This seemed to change some of my drive letter and since then I get an error communicating with device (although Calibre says I'm connected to my Aura) and get a pop up that says:

calibre, version 2.70.0
ERROR: Error: Error communicating with device

CantOpenError: unable to open database file

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 88, in run
File "site-packages\calibre\gui2\device.py", line 506, in _books
File "site-packages\calibre\devices\kobo\driver.py", line 1694, in books
File "site-packages\calibre\devices\kobo\driver.py", line 161, in device_database_connection
CantOpenError: CantOpenError: unable to open database file

Not sure if the change in drive letters has anything to do with this or a database file is corrupted or ??? Any help on this one? AtDhVaAnNkCsE