You don't need to buy a $500 extension to achieve "instant door and window sketchup free" status. You need the correct workflow.
: Vali Architects occasionally offers limited-time trials or "Lite" versions, though current professional use requires a subscription. Top Free Alternatives instant door and window sketchup free
While SketchUp Free (Web) does not support external plugins, (the last free desktop version) and SketchUp Studio (Paid) do. However, there is a powerful free ecosystem for desktop users. You don't need to buy a $500 extension
The plugin is too slow.