The download consists of a single .p7 or fmp12 file. All of the other required files are contained within that one. Documentation is available on the website and included as a pdf within the download.
FileMaker Pro 12
FileMaker Pro 11
A complete version history is also available.
RefreshFM uses the free BaseElements plugin, and the latest version is included in the download above. This plugin doesn't require any licence codes to use, so you can use it on as many machines as you want.