I think the original removal was due to others claiming part copyright.
He seems to be overly stating that it is all his.

No, the original removal Clay was because looking to sell them for $10 on disk to aid one of the pinball museums. There was a lot of backlash and claims by others to have substantially contributed etc. Messy issue, I am guessing the EM one is back first because I understand he did author virtually all of it himself.