OK, my bad - I changed my mind about using the install directory at the last minute and then promptly forgot to refresh the zip. This is now fixed and tested. I also fixed the mod version number in the modx file.
Sorry I'm still getting to grips with the automod /umil installer processes and requirements. Think of the most complex method to copy 7 files and make 3 database inserts that you can and double it... it's a learning curve.