New video card and monitor slows down Better touch tool

I had to replace my Apple 30" Cinema Display monitor and video card for my mid-2010 Mac Pro. I updated to a Samsung U32J59x 4k UHD display and a Nvidia GeForce GTX 680 2 GB video card.

Now my Apple Magic Mouse moves much slower, even with the tracking speed set to fastest setting. Is there any way to speed up my mouse?

Solved. I updated BTT, cleared all caches with Cocktail, rebooted and the mouse tracking speed was back to normal.