: Registering the product after installation allowed Claris to assist in recovering a lost license key. Important Considerations
If you previously purchased FileMaker 15 and lost your key, your best bet is to search your email archives for the original message from Claris or your reseller. filemaker pro 15 license key link
: Users are strongly encouraged to keep their license key in a safe place, as Claris can no longer reissue lost keys for this version. Claris Help Center system requirements for running FileMaker 15 on current operating systems? : Registering the product after installation allowed Claris
The key is printed on a label inside the box. Claris Help Center system requirements for running FileMaker
If you already own a license:
If you purchased the software directly from the Claris Store , search your inbox for a message from Claris or FileMaker with the subject line "Software Download" or "Order Confirmation".