How many systems can a single user install Microstiudio on?

[brokenWizard]

Looking through the forum and web site I found multiple users on multiple sytems need to purchase extra license. I recently received a new 3.4g system and installed Microstudio 2.609 with no problem. My question is when I blow away the hd on the old sytem and reload the software am I allowed to reload Microstudio on it? One user (me)multiple systems (2).

I emailed this question then saw the note about only 40% of emails get through so thought I'd try the fourm. Hope I chose the right forum.
Thanks in advance for your help. brokenWizard