The trainer options work for 3 out of 4 characters. None of the options work for the fourth character. In fact the One Hit Kill option works on them, while the options work on an enemy. For instance, the infinite action points option gives 3 of the party characters and 1 enemy unlimited AP. This wasn't an issue in the last trainer version.
UP - I have the same problem.
Can you upload your savegame file as forum post attachment? I can only test with savegames where I have 2 characters only.
Savegame attached.