I have another solution that I worked out today, and can help you if amc's solution does not.
I'll break it into steps for yall.
1) Uninstall SCAR and any other SVN program you have. You may need to manually delete some files left behind, but they shouldn't be much of a problem. If you cannot delete these (eg: you get the error: "Cannot delete, the file is in use") then simply restart and you will be able to.
2) Download and Install Tortoise SVN from the link below. I can personally vouch for the safety of this program.
Code:
http://tortoisesvn.net/downloads
3) Download SCAR 3.15b from this link.
Code:
http://freddy1990.com/scar.php
4) Once you have them both installed (have SCAR in program files) , go to C:\Program Files.
5) Don't enter the SCAR folder, but instead, right click on it. Look on the popup box that will appear. Click on "SVN Checkout..."
6) When the Checkout windows appears, make sure you have your settings like so.
URL of Repository : http://www.villavu.com/repositories/srl/
Checkout Directory : C:\Program Files\SCAR 3.15\srl
Checkout Depth: Fully recursive
7) Once this is done, go to C:\Program Files\SCAR 3.15\srl, and open the folder "place inside plugins folder"
8) If this wasn't obvious enough, you need to COPY everything in this folder, and PASTE it into the C:\Program Files\SCAR 3.15\Plugins folder.
9) It should work. Have fun botting 
EDIT: If you do get an error while running a script in SCAR, be sure to post that. For the noobs, it will be in the bottom dialogue box when you have SCAR open. These errors can help pinpoint problems in the setup.