I’m running 6.5.5 on an old XP box and while it’s stable, there is an issue with projects needing to be opened via the menu, i.e. they do not open via a project file.
I tried re-installing from scratch but maybe it is the OS that’s the issue and quite honestly I cannot be bothered any more with it, as my new box is streets ahead in terms of stability and performance (Windows 7 x64).
C7 does require more resources that is true but for the increase in stability, it is more than worth the expense if it means having to purchase new hardware.
I’m glad I made the change!