Install it like typical add-on for Blender (here is a link)
Turn on the add-on
Find add-on panel at Properties window inside Materials tab
Press Update button to connect to server
To enable/disable preview just press preview button. When preview is active, you can drag it with middle mouse button
Select material and press Import
Client is still under active development.
If you find a bug, of have another issue, you can find this project
on GitHub or
write me directly - ozzyrov@gmail.com