It seems to be working.
One request, though (and I know you're very early in the process), but I managed to get it (sort of) working with /loadui earlier today, and I noticed then (and with this build, it's currently the case) that the main menu button, even though it's not locked, isn't movable. It'd be really helpful if it was.
But as far as not crashing, this build didn't have any problems. Thanks for all the work you're putting into this, Agathorn.