Multiple flight sim community reports indicate that the developer, Joseph Stearns, has passed away. Site is Down:

Searching for an on torrent sites or keygen forums is a gamble where the house always wins. You might save $70 today, but the potential cost of identity theft, data loss, or a legal fine is thousands of times higher.

It was later confirmed by the community that the lone developer had passed away. Because the licensing and validation infrastructure belonged solely to him, the legal mechanisms to process, buy, or generate a valid died with the domain. The Hidden Dangers of Third-Party "Keygens"

Addit! Pro is essentially the ultimate toolbox for flight simmers. Instead of manually editing configuration files or dragging and dropping folders—which can often lead to corrupting your installation—Addit! Pro automates the process.

When you purchase ACID Pro, you receive a registration key. During the installation or first launch of the software, you will be prompted to enter this key. Once entered, the software "unlocks" full functionality, and you may be asked to register the product online with your email address.

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