Prompt Trimble NOT INSTALLED?

I have just downloaded sketchup for the first time , pro 2015. When I attempt to install an extension , it prompts that sketchup is not installed , I have “repaired” the installation of sketchup , still no luck?

Is the extension compatible with SketchUp 2015?

Anssi

What extension are you trying to install? And from where are you getting this extension?