I think a new tack might be a good thing for this project - open it up to the community, and have Adam approve all changes before release. Sort of a gated version of standard open source programming. I know he has no intention of making money on the project, as he has stated before. He feels that Chummer originally belongs to Randall, who wrote the version that this is based on (Chummer 4). Since Randall made the source code freely available, but didn't do an open source project, my suspicion is that Adam has been doing the same.
I really hope that he finds the time to come back to this, or make a shift to allow some of the coders in our community to contribute a little bit.