In the latest beta (Updated today) Glyphs crash on selecting anything in drawing mode! any points or shape! (Working on arabic+latin font PTW) and no plug-ins installed.
Sadly i can’t provide the file for debugging, it is a commercial font for a big company.
Is there anything other than re-downloading the stable build from the Glyphs site?
Did you upload a crash report. Ignore the dialog that comes up immediately, send the one that comes up when you restart the app. And add your name and a small description, that I can identify the report.