You are incorrect in that thinking.
ahhhh....... When your CursorEX became CursorXP, the code was change, and all existing skins had to be reworked.
Riccio convert K01 for me, and sent it to me to upload. I somehow managed to mis-name the upload, but it's still here, under the name of Koasati. When loaded in CursorXP, it's still shows as K01 in the list.
https://www.wincustomize.com/skins.asp?library=25&SkinID=16
hmmm... does that mean mine doesn't work?
it was for the old version of CursorEX...
guess I could go download it and see couldn't I... lol