While running a simulation I clicked on the icon for 'Starting new simulation' to enter the GUI. I just remembered it's a bug I've reported about before. I think the crash is caused if I have changed the mutation to anything higher than 1/1 on the mutations tab.
The code (located in the Optionsform window at line 764:
MutLab.Caption = (TmpOpts.MutCurrMult) + " X"
Hovering info:
Mutlab.Caption = "32X" (yeah, it was set at 32X now, but it doesn't matter if it is set at 2X or 8X for example)
Tmp.Opts.MutCurrMult = 32
This is where I should post this, right?