Thanks for the repo steps. I was able to get it to crash.
TL;DR: Here's the bug-fix release: DistortThis.zip (v2.7.5)
Here's what was happening. If you released the button on your mouse too soon, the 'Work Area' would have a Width and Height of 0, and in turn, the effect would try to create a Surface with a size of 0. Crash!
I've added a check to ensure the 'Work Area' has a proper size. If it does not, the plugin will allow you to try again.
Code Change: https://github.com/toehead2001/pdn-tr-distort-this/commit/d4371e9fd04c9da780ff47891c0f9584dd1aa2ee
Hopefully TR will return to the forum in the near future.