Okay, i tried it out on "winver" and i want to add some notes to the
instructions:
1) Right click on the file / directory you want to unlock, navigate to
tortoiseSVN and select 'check for modifications'
2) click on the "check repository" button
3) Select the file(s) you want to unlock, right click and select 'break
the lock'. SVN will automatically contact the repo and unlock the files.
4) Remove the svn:needs-lock property from the files (right-click ->
"Properties"
-> "Subversion" tab -> select the entry and click
"remove").
5) And finally, "commit" the audited files to ensure they are no
longer checked out as read only.