Triangulate faces with edge direction based on distance from reference mesh

Try this
http://www.digitalfossils.com/Download/NVil-Feb-15-19.rar

Edit > Options > Auto Polygon Retopo Rewind Enabled.

What is the poly count of your model?
Can you describe the behavior? For example, what action you performed and at what stage the problem occurred? There could be coding problems that can cause it and I want to find out.

I fixed a bug. Try this version instead.
http://www.digitalfossils.com/Download/NVil-Feb-16-19.rar

Having the option to disable this fixes my problem, so thanks!!
With it enabled, there is a delay after every component transform operation I perform, so every time I tweak a vert is freezes for a moment. This delay is increasing in duration as my retopo mesh grows in poly count. I'm only up to 1000 faces and it's already very noticeable.