The Package Manager Versioning is really a great move
The Manage Packages window now supports version selection for installing and updating activities packages. Since all packages feature version control, and older versions are available via a drop-down list, it’s easier to keep track of the evolution of activities
Even Orchestrator API reference also
The EnterpriseEdition can be updated by navigating to the UiPath website and downloading the newest version of the UiPath Platform installer (UiPathPlatform.msi). Running the installer automatically replaces all the old files without modifying any of your settings.
As mentioned in the initial post, all the user guides have been updated for the latest version. Regarding the architecture materials, they are no longer public on the forum due to privacy matters. You can raise a ticket to our support and request them: Contact Us | UiPath