Thanks, Roben. The only thing I've ever had to reinstall has been drivers for hardware. It is 4 activations, but they only say you have to contact them after that and they will evaluate your request for more. It's a piracy issue thing, nothing more. It never says that they will charge you for another license without letting you explain why you need to reactivate again.
The EQ site says you only need to reactivate if you 1)reinstall it on a different computer, 2) reformat the drive Windows is on, or 3) reinstall Windows (like to upgrade Windows). All in all, I don't think it would be a problem, at least for me, and I've heard that EQ6 is much easier to use than EQ5 and has lots more/expanded features. I'm just starting to look and am hoping to suggest design software as a Christmas present. Excel has it's limits! :D Also glad to hear you love it, Aggi!