When I am running multiple version of LV at the same time I have a hard time telling by sight which version a given VI belongs to. As others have noted, double-clicking opens the last version used, regardless of the VI version. This leads to occasional upconversion when an 8.6 VI is opened in LV2009 and subsequently saved. Every time I want to create a new VI I have to double-check which version I have open using 'About LabVIEW' or checking for subtle differences in the pallettes. I would appreciate it if the version appeared in the title bar of the window. In fact, any visual cue would be helpful.