Upgrading from GFI MailEssentials 9, 10 and 11 If you are currently using GFI MailEssentials 9, 10, or 11, you can upgrade your current installation. All version 9, 10 and 11 configuration settings will be kept. You will need to enter the fully purchased license key within 10 days of installing the upgrade. For information on how to obtain the new license key, visit http://customers.gfi.com. NOTE 1: Only GFI MailEssentials version 9, 10 and 11 can be upgraded to GFI MailEssentials 12. NOTE 2: You cannot undo an upgrade: i.e. you cannot revert to version 9, 10 or 11 once you have installed the version 12 upgrade. To upgrade: 1. Launch the GFI MailEssentials 12 setup file on the machine on which you have installed GFI MailEssentials. Setup will prompt you whether you wish to remove the current version of GFI MailEssentials and install GFI MailEssentials 12. Click Yes to proceed. Screenshot 4 - Confirm the upgrade 2. Setup will now proceed to install GFI MailEssentials 12 in exactly the same manner as a new installation (for a detailed description, see this chapter), however it will not let you change the destination folder. This section applies to GFI MailEssentials 9 users only When the GFI MailEssentials 12 setup has copied all the installation files, it will notify you that it needs to convert the Bayesian weights file to the new format used in GFI MailEssentials 10 onwards. The new format is more compact and uses less memory. During this conversion process, a progress dialog box is displayed on screen. Once the conversion is ready, click Finish to complete the upgrade.