Ok. So we’re all updated and working again. If it’s still crashing for you then rename the garrysmod folder to something else and then try it again. If that’s too technical for you then uninstall garry’s mod and try again.
In this update I included the engine binaries. This means that it should be very rare that it crashes again due to a source engine update. But it does introduce some other problems. These are problems that we’d have to deal with in the next update anyway, but they’re problems none the less.
But we shall see. The days of seeing GMod updating and thinking “oh no - I won’t be able to play for a couple of days” should be over.