Please read careful, i have checked from that link and have those lines:
1.Install Fireboard theme: copy fb_ja_sanidine.zip file from Extensions package to your site path: yoursitepathcomponentscom_fireboardtemplate, extract fb_ja_sanidine.zip with name ja_sanidine. And now you have Fireboard style of Sanidine.
2. Community Builder: Go to Admin panel >> Components >> Community Builder
* Go to Plugin Manager to install Community Builder theme: Click Browse to choose Community Buider theme (located in Extensions package) >> Click Upload File & Install and now you have Community style of Sanidine.
You can read again in more detail