Hello Mr. Antifun !
Unfortunately I don't have a savegame file anymore, but I will try to explain as best as I can. In the beginning of part 1, Off the coast of England, of the first episode, we are introduced to the skill system, and get 3 skill points I believe. Using the trainer, I maxed out the entire skill tree, making sure that I get 0 points left (you can't continue if you have unspent skill points, and you can't spend them if you are maxed out). At the end of part 1, I got additional 4 points, and there is where I got stuck. Being maxed out on all skill sets, I couldn't spend any points. And without the possibility to reset, you get stuck. Hope this clarifies things.
Thank you for your work !