DRT has been rewritten in Rust; this is the first release of this codebase, and the first release to support XP12.
DataRefTool has been rewritten from scratch using Rust. This was done for several reasons:
Because of the magnitude of the change, there may be quite a few new bugs. I expect to release a series of updates to DRT over the next couple of weeks.
Finally, X-Plane 12 is now fully supported as well. For the forseeable future, I expect to support both X-Plane 11 and 12.