What is traktor doing every time you close the application?
I have a very large database of files and when closing the application with traktor 3, it takes 20 minutes or more to close the application while waiting for "storing collection".
I downloaded a trial version of traktor 4 to see if this behaviour has improved and to my surprise it now eadily takes 12 hours or more to do the same.
I'm editing nothing. Just open T4 and close it again and I have to wait the whole day for it to finish 'storing collection'.