Empty labelbrowser with more then 6200 books and error message when adding books

[JanMvdDool]

Sinds yesterday I get an empty browserbrowser and I can't add any book.
Even the books exported with Calibre. When adding files Iget the message:

3x Everest - Harry Kikstra.epub
Traceback (most recent call last):
  File "site-packages\calibre\gui2\add.py", line 129, in start
  File "site-packages\calibre\gui2\add.py", line 219, in add
  File "site-packages\calibre\library\database2.py", line 3162, in create_book_entry
  File "site-packages\calibre\library\sqlite.py", line 311, in run
DatabaseException: user-defined function raised exception
 RemoteTraceback (most recent call last):
   File "site-packages\calibre\library\sqlite.py", line 271, in run
 OperationalError: user-defined function raised exception
Also left mouse click is not working in te filebrowser.

I hoped the problem was maybe fixed wih the new version but 0.8.15 did the same.
I have also uninstall and a reinsstal but also this dit not solve the problem

[JanMvdDool (j-dool52)]

Browserbrowser must be Labelbrowser

[JanMvdDool (j-dool52)]

I tried to rebuild the metadata db, at the end I got the following error message:

Traceback (most recent call last):
File "site-packages\calibre\library\restore.py", line 107, in run
Exception: Something bad happened

Also restarting Calibre in debug mode doesn't work, Calibre shuts dow but doesn't starts again (automaticly).

[JanMvdDool (j-dool52)]

Eureka (I found it!!!)

Again I deleted every thing of Calibre from my PC, cleaned register and so on.
I found out that by removing Calibre from the PC in the dir AppData / Roaming the directory of calibre not was deleted.
After deleting this dir and reinstall Calibra, everything works fine again!!
I wil go on with this magnificant program!!!!

[gf (gf-interlinks-deactivatedaccount)]

Closed per reporter’s feedback.