Okay, I managed to recover (using a data recovery program) the metadata.db file; however it gives me the following error
ERROR: Invalid database: <p>An invalid library already exists at D:\My Books\Calibre, delete it before trying to move the existing library.<br>Error: file is encrypted or is not a database
RemoteTraceback (most recent call last):
File "site-packages\calibre\library\sqlite.py", line 142, in run
File "site-packages\calibre\library\sqlite.py", line 94, in get
DatabaseError: file is encrypted or is not a database
Traceback (most recent call last):
File "site-packages\calibre\gui2\wizard\__init__.py", line 440, in move_library
File "site-packages\calibre\library\database2.py", line 441, in __init__
File "site-packages\calibre\library\database2.py", line 312, in refresh
File "site-packages\calibre\library\sqlite.py", line 171, in run
DatabaseException: file is encrypted or is not a database
RemoteTraceback (most recent call last):
File "site-packages\calibre\library\sqlite.py", line 142, in run
File "site-packages\calibre\library\sqlite.py", line 94, in get
DatabaseError: file is encrypted or is not a database
Can these file be fixed?