Working fine here; Miner hat (maybe all hats if they have a strength?) degrades, but bringing a torch solves that.
Some instructions I have for other users:
-Put trainer into your root dont_starve folder. -With the game Closed, open and activate the trainer.
Troubleshooting -If you open the trainer first, then open the game and try to activate, it will not work. The trainer needs to be opened AND activated before launching the game.
-Some options don't completely apply to a game if you've already started it before using the trainer (Only saw this happen once, when I first used the trainer). Once you hit New Game, all options seem to completely apply.