I’ll have to keep this short, because there’s some sort of network monster here that eats all of my long posts.
There was a bug in 1.30.1 and lower that caused a crash on startup if GlassCalc was set to save history items and the saved history contained a semicolon. This is now fixed. If you can start GlassCalc without it crashing, the updater should pick up the new version. Otherwise, download the new version (still 1.30) from the GlassCalc software page.