functionality is based on 3 java-Buttons wich are added at the end of the "current
folder browser"-toolbar. Their callbacks will call a dos command which invokes
tortois.exe with some parameters (which you can edit for your purposes)
Additional commandline parameters for tortoise can be found here:

http://tortoisesvn.net/docs/nightly/TortoiseSVN_en/tsvn-automation.html

For removing the buttons simply restart Matlab