Take the 2-minute tour ×  In revision 1 a folder existed. In
revision 2 the folder was accidently deleted and the change
committed.  We wish to roll back such that the folder is
present, and retain its history.  In the TortoiseSVN docs it
indicates 'how' in the section titled "Getting a deleted file or
folder back".  To quote:  Getting a deleted file or folder back
If you have deleted a file or a folder and already committed
that delete operation to the repository, then a normal
TortoiseSVN -> Revert can't bring it back anymore. But the file
or folder is not lost at all. If you know the revision the file
or folder got deleted (if you don't, use the log dialog to find
out) open the repository browser and switch to that revision.
Then select the file or folder you deleted, right-click and
select [Context Menu] -> [Copy to...] as the target for that
copy operation select the path to your working copy.  A switch
retrieves the file into my working copy as one would expect,
however there is no "Copy to" option on