[WS64]

What does this mean, and what do I do now?

calibre, version 1.41.0
ERROR: Startup error: There was an error during calibre startup. Parts of calibre may not function. Click Show details to learn more.

Traceback (most recent call last):
File "site-packages\calibre\gui2\main.py", line 238, in initialize_db_stage2
File "site-packages\calibre\gui2\main.py", line 187, in start_gui
File "site-packages\calibre\gui2\ui.py", line 396, in initialize
File "site-packages\calibre\gui2\init.py", line 500, in save_layout_state
File "site-packages\calibre\gui2\library\views.py", line 498, in save_state
File "site-packages\calibre\gui2\library\views.py", line 492, in write_state
File "site-packages\calibre\db\backend.py", line 116, in set
File "site-packages\calibre\db\backend.py", line 112, in __setitem__
File "site-packages\calibre\db\backend.py", line 792, in execute
File "c:\cygwin\home\kovid\sw\build\apsw-3.7.17-r1\src\cursor.c", line 231, in resetcursor
CorruptError: CorruptError: database disk image is malformed