I am getting so many crashes with Beta 4 that I can't use it. Selecting parallel resources is big problem. I think it has to do with selecting a parallel resource that doesn't have the exact same verse heading in the selection window. For example if I am in a commentary looking at Song 2:4 and I select another commentary on Song of Solomon but there it doesn't have a comment or heading for Song 2:4 (perhaps it has a general comment for Song 2:1-7), that's when I think I get the crash. I tried to attach the log files below.
I also often get crashes with opening existing Layouts.
8640.Logos4.log
3438.Logos4Crash.txt