You can upgrade your Filr setup from Filr 3.x to Filr 4.0. However, Filr 4.x releases are only available as an Online update to Filr 4.0 or later.
IMPORTANT:Filr 4.x is available as an Online update to Filr 4.0, PostgreSQL 4.0, and Filr Search 4.0 appliances or later.
To Install a New Filr 4.x Appliance: You must install and configure Filr 4.0, and then apply the 4.x updates. To apply the Filr 4.x updates, see Section 10.0, Updating Filr through Online Update Channel