GMAppImager relies on 3rd party extensions I wrote for GameMaker. Whenever I make the slightest OCD change to my extensions I tend to update all my assets and projects which rely on them, so that everything is using the latest versions of my work. Just a heads up, most the time these sort of updates don't actually change whether GMAppImager works or not, it might even be something as silly as a whitespace change in the underlying code. Just an FYI. However, if any serious bug fixes or feature additions make it into GMAppImager, you will be the first to know. :)