A Pro key unlocks these features, turning a home tool into an enterprise-grade solution.

A: If the key is a string of letters/numbers (e.g., AB3C9-7D2F1-... ), it might be a previously valid key that has since been blacklisted by AOMEI's activation server. Using it will result in an "Invalid License" error. If the key requires running a ".exe" file—never run it.