Okay, I think I might have confused you somehow.
A22 and tortoise SVN have nothing to do with each other.
A22 is a release, a packaged version of SVN at a point in time.
After installing tortoise svn you need to follow the instructions there: https://trac.wildfiregames.com/wiki/BuildInstructions
To do step 2 just right click in the folder where you want svn to be installed, and click checkout .