Since LateralGM says it can open GMD's, it would be nice not to get an error when you try to open a GMD with version 500.
Game Maker 5.0 support would really be nice.
useradd
more /root/Features/Game Maker 5.0 Support.thread
Will require documentation of 5.0 and 5.1 first, and then support must be added to the file readers, and then we'll have to figure out what to do with unsupported aspects. This will take time.