Choose this if you have a perpetual license or serial number (666-69696969, etc.). Follow the on-screen prompts to complete the registration. Offline Activation (For Permanent Licenses)
The base version (2019.0) has memory leaks and rendering bugs. autodesk revit 2019 installation and activation
Right-click the Revit 2019 shortcut → – this helps register libraries correctly. Choose this if you have a perpetual license