Hello and welcome. I never needed a trainer for Darkstone because of the fact that the difficulty of the game ramped up at the same speed as my characters. If you want to look further, there is an archived Darkstone forum
here.
Set the forum option to "Show all topics", read the top post, then do a search for "trainer" and you might get some more information. Btw, the version you should be running is 1.05b, not 1.05
Hope this helps.