The Upgrade Custom Applications help provides guidance on how to upgrade custom applications that use the IBM FileNet P8 Platform development tools to operate in this release.
For information on the supported upgrade paths for this release, see the "Upgrade Planning Considerations" section of IBM® FileNet® P8 Platform Installation and Upgrade Guide. You can find a listing of new Content Engine classes and properties in the 4.0 and 4.5 releases in the "New Content Engine classes and properties" appendix of Plan and Prepare Your Environment for IBM FileNet P8. For information on changes and new features in this release, see the "What’s New" section of IBM FileNet P8 Release Notes. For information on how to download these documents from the IBM support page, see Accessing IBM FileNet documentation.