Dj pro For Windows 10, My songs stop and starts over before they are done?? Why?

Hi !
I Just downloaded Dj-pro into my Windows 10 and when i play songs from Spotify The songs suddenly stops before they are done and starts over… ? why? this must be wrong.

happens to me too.
Urgent answer please

I am having the same problem. This is really annoying and unacceptable for DJ software. And I payed 50€ for this…