I've added the Erudite class to the upcoming release. It's pretty basic as I can't figure out a good way to restrict users to manifesting only the unique powers they have available to them. For now, players and GM's will have to self monitor.
I've also updated the Expanded Knowledge feat to allow users to select which power to add to which class. Currently, this will only work with one class which should cover most cases. I'll need to think about how to improve this functionality. Would be really nice if feats allowed two choosers.