We have used CVS for version control with LabVIEW for several years. We used Tortoise CVS as the CVS client. I posted some of our lessons learned here:
http://www.chiefdelphi.com/forums/sh...60&postcount=5
Even though version control with LabVIEW is a little harder then a text based language, it's still worth it, even if you only use it as an integrated backup solution.