The Extrude Tools install and work just fine in all current versions of SketchUp. So something is clearly wrong with your end... Have you installed SketchUp properly ? If you are using a MAC have you installed SketchUp properly - i.e. you NOT working from the installer app version... But if you are on a PC Repair the installation whilst using Run as administrator on the Downloaded installer's exe file... If all else fails, try this clunky work around... Change the file-type suffix of the downloaded .RBZ to .ZIP Now extract the contents to a folder and move the RB and subfolder of the same name [with its contents in tact] into your v2022 Plugins folder. If it doesn't extract properly try downloading the RBZ another way... After you get the RB & subfolder into Plugins restart SketchUp and see what happens...