The license is stored in the license.properties file, Simply replace the trial license with the three lines from your email to end of the file, such as
licenseEmail=username@userhosting.com
licenseKey1=10302c0214029c6570f60ae6e0d0350d45f0544b18d2071
licensekey2=d83021462f10cc0cc1e2c0214029c9885a79b5face43f53