Currently Being ModeratedNov 10, 2012 6:54 PM (in response to moctavio)
First how did you purchase Aperture and how did you install it on the Air? As the Air does not have a DVD drive it would help to know how you got the app onto it.
Start with Troubleshooting Professional Application Serial Numbers and see if that helps.
There is also Pro Application Replacement Serial Numbers if you're not able to get your serial number working.
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