Even though Amayeta website is still up and running and you can still download the trial version of the application from its website, according to an announcement from the official support page, the product has been discontinued since 2015. Sadly, this means that you will no longer be able to re-activate your application and you won't be able to contact the company for an alternative solution.
Also, nowadays, most who people use tools that can obfuscate the Flash code, do so for nefarious purposes, so I can't provide you with an alternative application.