A lot of people don't know this but if you contact the customer support team from the site you purchased the software from, they can often generate you a new activation code.
They will first try to contact the developer and if they don't hear back from the developer within a couple of days then they will do it.
So for example if you purchased from the MobiHand network (mobihand, pinstack, crackberry, blackberrcool, etc.) then you should email
Not sure who to email for Handango but I'm sure you could find the address somewhere on their site.