Yes, there's a good way to do it. It's called source code control. Based on your question you are apparently not using it. Now's your chance to learn about it and use it. LabVIEW is a programming language, and as such, doesn't have a source code control system. At least not a good one, anyway. Opinions on which one is the "best" are as varied as there are flavors in a Ben & Jerry's. I use Subversion with TortoiseSVN. Very simple and extremely effective. JKI has a toolkit for it: http://sine.ni.com/nips/cds/view/p/lang/en/nid/209022.