Having an issue with MatterControl crashing after adding an .stl file from the directory. Currently running Ubuntu 20.04 with MatterControl version 188.8.131.5270. Initially, the open file option didn't do anything before installing gtk-sharp2 where I now have a crashing menu. Is there a configuration file i can alter to allow for a different file manager to run (nautilus) to see if I get the same error? I have also included the crash dump as a text file.