I've been wondering this myself. He sent me a DM on the 6th through Discord that he won't be using his GH account anymore.
He also attached the latest diff of the repo, so luckily the source code is safe.
However, he hasn't responded yet to my inquiry as to what instigated this sudden decision.
This does however throw a big spanner in further development for the time being. I have limited knowledge and experience with Python, and zero experience with Imgui.
So me picking up the slack and continuing is going to take a while. I did forward the source to
WillyJL, but he's currently buried deep into another project.
Besides, for him to continue this variant, means he would need to find the time and desire to incorporate all the changes and additions into his own version.
Also, given that it's a fork of
WillyJL's version, with several new features and changes, I feel it's not right to 'pollute' this thread with posts about another version.