Some fixes + future tech support

I’ve fixed a few things that have come up since I first posted this, the most major things being the vertex buffer export and the issue where the program occasionally crashes when you quit. There are some other things I might do, but honestly I don’t have a lot of time, so this might be it for a while.

On that note, I’m changing the way I’m going to deal with tech support. I’ll still do bug fixes and stuff when I have time and I’ll add features if I have a direct need for them myself, but more detailed help is going to cost $10, in the form of either the source code download or Patreon.