Repairing permissions after windows reinstall

[ht at inf dot ed dot ac dot uk (Henry S. Thompson)]

Good news: My cygwin file tree survived a Windows (10) reinstall
Not-so-good news: I have a new SID, so not only do I not own those files
any more (that's easily fixed), but I don't have the permissions I
should, because they are now held by some miscellaneous old SID.

In fact I see _two_ raw SIDs when I look at the security tab for any
directory in the old cygwin tree: one has Full control, and the other
just Read & execute.

I presume the first is the old me, what's the second?

Can this be easily fixed, i.e. put me back where I used to be?

Thanks,

ht

[Note, I have read

  http://superuser.com/questions/439675/how-to-bind-old-users-sid-to-new-user-to-remain-ntfs-file-ownership-and-permiss

which was the only thing I could find by searching, but I wondered if
there was a Cygwin way. . .]
-- 
       Henry S. Thompson, School of Informatics, University of Edinburgh
      10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND -- (44) 131 650-4440
                Fax: (44) 131 650-4587, e-mail: ht@inf.ed.ac.uk
                       URL: http://www.ltg.ed.ac.uk/~ht/
 [mail from me _always_ has a .sig like this -- mail without it is forged spam]

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple