Sorry man, There isn´t any error logs when it crashed or froze or did the rewind bug/glitch.
And i don´t know how to these things. All you have from me is what i have said, sorry there´s nothing more man
I understand, Friend. Try to reinstall, a clean reinstall and maybe will fix that freezes. Because renpy is very light engine and practically impossible to break your system that much. Clean installation definitely will fix this issue.