REKORDBOX CRASH

Hi all, My rekordbox crashed just before start my set. I'm using rekordbox 5.8.5, and Macbook air Mojave 10.14.5. When I'm select or import a playlist Rekordbox starts "Thinking" and I have to force quit the software after few minutes.

I have delete all the playlist/folder and when I'm trying to make a new folder/playlist I have the same problem again.

Any suggestion please??

TIA