Full Video in App

Dear All
I try Cross DJ with the trial version... after some few days, i decided to download the full version on the App Store for my Mac Book Pro Retina.
The problem is that the mixvibes watermark is still on the outpu screen when I played some videos....
I deleted all versions and re-install the full version and it still the same....
May someone could help me?
Guillaume
PS : I apologize for my bad english...
I try Cross DJ with the trial version... after some few days, i decided to download the full version on the App Store for my Mac Book Pro Retina.

The problem is that the mixvibes watermark is still on the outpu screen when I played some videos....

I deleted all versions and re-install the full version and it still the same....

May someone could help me?
Guillaume
PS : I apologize for my bad english...