Works on any version after 0.8.3q

The compatibility line will glow yellow with the text "Compatible game version" if your game version differs from the one the trainer was tested on, but all basic functions have been found to be operational. In this case, it is likely that Bare Mettle released a patch update that did not affect the functions required by the trainer, and in theory, it should be functional.

If incompatible functions are detected, the trainer will display a warning window with non-working functions (many others may depend on them), and the compatibility line will change to red with the text "Incompatible game version".

The author's Discord — Horse4Horse

There is also a thread on fearlessrevolution where changelogs are posted, there is activity, and you can request new features. The link to the forum is available via the "Forum" button in the trainer itself or through an internet search.