http://bugs.winehq.org/show_bug.cgi?id=26373
--- Comment #6 from GyB gyebro69@gmail.com 2011-03-11 10:06:12 CST --- (In reply to comment #5)
Well, the SID is stable now, it won't change again when you create a new prefix, which should make such registration data portable across prefixes.
You answered my untold question: will that part of Wine change frequently in the future? Thanks for your reply, that's quite reassuring.