Reinstall norton 360 gold after system restore

hey guys

 

i installed 360 gold earlier today but have had a system crash a few hours later and have restored my system  to factory settings.  i have logged into my norton account and i have 1 download left.  obviously i dont want to use my last download onto the system that had it earlier.  is there a way to avoid this or do i have to waste my last download for this pc considering it had it on a few hours before...   as i need this last one for my other machine.  i have used 2 installs out of the 3 i paid for. but dont wanna use the last one as a "duplicate"  as it is still only 2 machines that have it.

 

is there a way around this??