1. Download the most recent version using the link below

 
Older long-time stable version: PC/Mac 17.0.8  
What is new in version 20
All versions: downloads / descriptions
 

These are .rbz or .apk files. Technically they are zip archives, but you don't need to extract them!

2. Install the extension

For PC:

If an older VR Sketch was already installed, you need to restart SketchUp now.

For Oculus Quest: see this page.

For Pico Neo 3: see this page.

3. Have fun

VR Sketch is now installed, just click "Extension", "VR Sketch", "Send to VR" to start working in VR!

For more info see the Documentation.