I downloaded this mod yesterday as a replacement for the Cosmos version (which appears dead). XanDurability appears to work but the small window that anchors the larger popup shows only the anvil icon. The percentage isn't appearing.

I fixed this and should be releasing the update soon. They have changed the way some items are parsed. Except an update within a day or two on the addon sites. I'm back into the addon world after a hiatus from WOW ;)