Installation of Eclipse plugin offline (Ubuntu 16.04)

I have to install OpenFrameworks as part of a class. I have one computer that has a bad internet connection that I need to install the Eclipse OpenFrameworks plugin on (It’d also be useful to have a local copy in general, too).

I first tried simply visiting the link given in the installing OF with Eclipse (Linux) page, but I got an Error 403. My other computer installed the plugin perfectly well, so how do I get the relevant files from this link and into an archive for offline install?

I noticed the GitHub OF Plugin page, but I do not know what, if any of the things there are needed, or if it first needs compilation.

Could you please tell me how to get an archive file suitable for use with the help>install new software menu’s Install From Archive feature?