Rekordbox 4.3.1 Backup Crash

Hi 

My Rekordbox is broken after upgrading to 4.3.1. I cannot export anything. I cannot backup anything. I am really stuck and need to be able to work with the software. Please see a similar issue logged recently on the forum. This is the same setup and scenario that I have. This needs to be fixed immediately.

https://forums.pioneerdj.com/hc/en-us/community/posts/115017832883-Backup-Library-crashes-4-3-1