How do I recover my license key / serial number? appsolute GmbH May 22, 2017 22:34 Updated Follow Please use our serial number recovery tool. If you are still unable to recover your serial number please contact our support and provide the following information: Name Address E-Mail Order number Related articles Is my MAMP PRO 3 license valid for MAMP PRO 3 Windows? I want to revert back to MAMP PRO 3.52. How do I do a complete uninstall and re-install of MAMP PRO? Do I need my /Library/Application Support/appsolute/MAMP PRO/db/mysql directory? Are updates free of charge? Comments 0 comments Article is closed for comments.