STEP 2: Install Modelur
Now head over to your desktop and open SketchUp.
Once SketchUp is loaded, open Extension Manager.
TIP: You can find Extension Manager under Window menu in SketchUp prior to 2021.0, and under Extensions menu in SketchUp 2021.1 or above.
When Extension Manager window opens, click on Install Extension button at the lower left corner and point it to the RBZ file you have just downloaded.
Now click NEXT to complete registration
TIP: In case Modelur toolbar doesn’t show up automatically after installation, you can always open it from View Toolbars… Modelur.