SVN file locked by me, now cannot commit it

Question

According to Simon Large (co-author of TortoiseSVN):

Use the repo browser and 'break lock' from the context menu.

Screenshot:

Note that this item will only appear if the item is, in fact, locked. There's also a 'Release lock...' command outside of the repo browser, shown here:

A Clean up on the working copy root fixed the issue for me. I, too, had done a Cancel while doing a SVN Commit.

In the terminal,

svn cleanup 

will break the locks.