How come you can't tell which version a .vi was created in until you open it? How come you can't just tell whether it was created for 7.1 or 2010? An idea is to have it save a different .vi extention, much like in Microsoft Office, for exampe, a 2003 version would not open a 2007 version, and you can tell before opening because of the .xls or other extension. For labview, it could be like for 7.1 it was .vi71 and for Labview 8.2, .vi82, and for 2010, how about .vi2010?
Maybe this could come in handy for those who are looking for certain vi's of a certain version.