I think by platform he means windows or linux.
Type sm exts list in the console and see if the extension is loaded. If not then you should check again to see if you missed something.
I ran into a loading problem loading the SM 1.4 version, but when i updated to the newest SM 1.4 snapshot it worked right away.
edit: Just wanted to thank you V10. I've been using this for a couple days now, the extension works great.
