Oops, there seems to be something wrong with your serial number. Please contact support@mamp.info.
Delete the user preference file:
~/Library/Preferences/de.appsolute.mamppro.plistAnd then you can re-enter your serial number.
Delete the user preference file:
~/Library/Preferences/de.appsolute.mamppro.plistAnd then you can re-enter your serial number.