This time I didn't do a mistake, at least not a new one today...
Fixing the 1st bug revealed another old bug. I fixed it as well so now your main player skills won't reset anymore.
The Red Potentials should be alright too now. (the potentials were recalculated for your main player, while it should actually never be done, and in bonus it was corrupting the current skills
)
You can redownload & install the demo.