I have never had this problem before but for a few days now it has been appearing (it doesn't always occure). When I put Twixtor onto a clip, you can suddenly see that the clip is in the corner of the preview for a few keyframes and whenever I put my cursor there to look at it, the programm simply crashes.
I have never heard of this happening before and could not find anything about it... This is why I really hope that you all can help me!
Which version of Twixtor is it? and check if its GPU related by turning off and on the GPU option in Twixtor.
If old version, try updating to the most current version, Revisionfx do regular updates and improvements
on all their products.