HELP: Can’t figure how to go back to 16.1

This is probably a dumb question, but here it goes…

I downloaded 17.1, but it wouldn’t launch so I uninstalled and now it won’t download at all. I’d like to go back to 16.1 because it was working fine. I can’t seem to figure it out though. I go to the older version section, go to “source” 16.0 Jarvis, click run and it open a file in 7zip, then I don’t know what to do. I have checked the forums and wiki for solutions but couldn’t find anything. Forgive my ignorance ,any help will be greatly appreciated.

HP laptop
Windows 8.1
Processor Intel Pentium CPU N3540 @2.16GHZ
64 Bit