As with every new release of Sketchup, this time too, FlexTools is fully compatible to work with Sketchup 2021.
How to get FlexTools running in Sketchup 2021
1. Download the latest FlexPack Pro RBZ installation file from
2. Install in SketchUp as usual: Window > Extensions Manager > Install Extension > Choose the FlexPack Pro.rbz
If FlexTools was already installed on the same computer (on a previous version of Sketchup), you're all set! No need to activate again.
📌 The same applies for ComponentFinder.