Altova European Single Electronic Format (ESEF) XBRL add-in for Excel is licensed per user, per year. In order to continue to use the software after 1 year you need to renew the license.

• Installed User Licenses - Installed User licenses are purchased per number of computers on which you would like to install the software. For example, if you purchase a 10 Installed User license, you may install and use the software on up to 10 computers.
• Concurrent User Licenses - A Concurrent User license allows you to install the software on up to 10 times the license number, provided that only the licensed number of people use the software at the same time. For example, if you purchase a 20 Concurrent User license, you may install the software on up to 200 computers and use it on up to 20 computers at the same time. All Concurrent User licenses must be used in conjunction with the Altova LicenseServer.
• Named User Licenses - For each Named User license, you may install the software on up to 5 computers or workstations. This allows the user to switch from one computer to the other as necessary, provided that only one instance of the software will be used by the Named User at a time. All Named User licenses must be used in conjunction with the Altova LicenseServer.