Backup / transfer skin settings between installs



Apologies if this has been answered before, I searched and couldn't find a clear answer.

I was running OpenPHT on "normal" x86 hardware and have just got a RPi3 and put Rasplex on it.
On the first system I was running the Black Edition skin and had customised it to my wife's liking.

I had hoped that just pulling the entire skin folder from OpenPHT to Rasplex in the appropriate directory would transfer all those customisations as well, but that appears to not be the case.

Am I missing something obvious, or is there not a simple way to transfer all of my customisations as well without just doing it "by hand" as it were?