You guys are great and I have not completely ruled out operator error on my part, but thought I should pass this through you just in case. I have a sequence that crashes every time I do a save using the most recent Xlights version (i.e., v37). It crashes Immediately upon taking the "save" action. I did some trouble shooting on my own and the problem does not occur with version 29 or older. Hopefully I have attached what you need (as it happens every time I save with v31 or greater).
I have multiple sequences (10+), and this crash is only happening to this one sequence (so far),
My system is a newer MacBook Pro laptop, running OS 10.14 Mojavi.
I also noted that I get similar results on the same type of sequence on my iMac running 10.13.6 (High Sierra). It is just not as dramatic (it doesn't crash till the rendering is complete and you exit out of the program).