After purchasing a specific edition of Cerberus FTP Server, users will be emailed a license code that can be used to turn the trial version of Cerberus FTP Server into a fully licensed and functional Personal, Standard, Professional, or Enterprise edition. No new installation is necessary. Each license includes a 1 year Service Agreement that entitles the purchaser to free upgrades and support for 1 year from the purchase date.  The license code will work with any version of Cerberus released within one year of the purchase date of the license. 

A 2 year Service Agreement option is also available that provides a license code that will work on any version of Cerberus FTP Server released within 2 years of the license purchase date.

Note: The software itself never expires, just the ability to update to the latest version expires. When your free support period is over you can purchase a new support agreement if you wish to continue receiving free support and updates.