I just downloaded the game from Steam and used the blind boss cheat to get through the first chapter. It worked just fine. Then, I tried to use the item cheats (green gel, etc) and none of them worked. I have been trying to troubleshoot this issue and have found no solution. I even tried using the older trainer. Any hint on where I should look. What is interesting is that the trainer finds the game and some of the cheats work while others don't.

yeah same here, the only cheats which dont work are the item cheats, all other work. Tried some different start options on the game, like i had with the first trainer, but nothing changed :/