the project generator simple is deprecated now, the downloadable packages come with a new version of the project generator, you can get it from the nightly builds if you need.
i've just removed the part of that script that compiles the old project generator.
also that scripts installs a command line tool, you can run it from anywhere like:
projectGenerator pathToProject -a"ofxAddon1,ofxAddon2,ofxAddon3"