FAQ:

That’s how to install XMP presets in Lightroom!

Lightroom changed their files from .lrtemplate to .xmp, so all new presets are now stored in the adobe camera raw settings folder as xmp files instead of .lrtemplate. Installation is similar to previously, except to install lightroom xmp develop presets you now have to move them into the adobe camera raw settings folder, rather than the previous lightroom presets folder!