Andreu,

dont really anderstant your question.There is a two diferent things:
-first is:
style is independent file who you can edit and save them with the same or diferent name.Style who just edit is saved in folder when coming from,but in user style section.
For exsample:
if you edit style from Swing folder then be saved in Swing User style folder....

-second:
registration file is mesage with who you can recell your setings when you madet that registration.So you cant edit style thru registration.Registration just remember where is your style location and all ather global setings when you madet that file.

Hope I helping you a little