RB 4.2.4 Errorcode when closing...

Hi, using RB DJ full license. Have updated from Version 4.1.2 (realy stable) to 4.2.4. Everytime I Close the RB it gives me an error Code: unexpected application error. It looks like all other things work good, but I have bad Feelings for Club using. System: Windows 10 64 bit all updates, new Installation. RB 4.2.4 64 bit. DDJ-RX. Hope you can help, without to go back to 4.1.2.