FYI, updated to v1.0.1, partially fixing a bug where the Python 3-based rpyc decompilation was breaking.
It now runs better, but I have encountered some rpyc files which cause problems for the Python 3 decompiler (which is in a state of flux and will take a bit to resolve fully.)
In the meantime, if you need to decompile a rpyc file that does not work for running this utility on a Ren'Py 7.5+ based game, you could copy the problem file into the game folder of any older Ren'Py game and this utility will instead use the Python 2-based decompiler, which is more robust at this time.