I see you have cleanmymac installed. This tool has a function that is known to damage other apps. Please uninstall it completely, restart your Mac, redownload Glyphs, move it back to the Applications folder, update it to the latest beta, and try again.
Thanks for your answer, I did as you said but the problem persist. I noticed that the crash happen when I first click on the Script menu, then move on to the Window menu by hovering it. Again, never when the application just started, but after some time.