I had a deeper look into the skins and tried 2 ways to update it, they need so many fixes and content adding, I don't even see a good way to start the work without restarting the puzzle from zero.
JRR skins counts twice number of files than Daimon UI !
Maybe you should better manually import one by one the TGA files into an up-to-date skin XML file.
Azure glass universal skin clould be a good candidate for a starting base to rebuild Daimon UI blue over it...
Anyway I don't feel the energy/motivation to do it myself