If the legacy bundle is successfully located and installed, or if equivalents are sourced via the App Store, the following functional categories are typically addressed:

file and select "Run as Administrator" to ensure all library files are placed in the correct system folders. Verify the Tab: Once installed, restart Revit. You should see a dedicated Extensions tab

After you successfully UPD download Revit Extensions for Autodesk Revit 2018 and complete the install, follow these best practices:

The final “UPD” (Update 2) carries a checksum. Verify your file’s integrity using: