Rotobrush 2.0 is not working. it is unusable.

I noticed the preformance of Rotobrush 2.0 is as of the last few updates, Is totally unuseable it will begin to propagate a few frams and then NOTHING it hangs and does nothing a few seconds into the clip OF ANY clip I use. Both in the Beta and the  the non Beta versions of After Effects. I have heard that some people have had to back date there graphics card drivers to get it to work again. What ever the problem, at this point it is unusable.