Oh dear -- I'm not sure what program you were asked to download. It sounds to me like maybe you have installed a different browser or something. (Bing, Firefox, Edge, Cortanna, Opera, etc.)
It is possible that you didn't have a PDF (Portable Document File) reader and may have had to download Adobe or another reader. That's ok, but that should be the only program needed to access Bonnie's instructions and it should not have changed anything else.