In either contribution, as with most contributions, there are embedded folders. You must first unzip to extract the folder structure such that the files are extracted into their correct folders.
Upon viewing, you'll see an /includes/ folder.
When uploading, the files in the /includes/ folder need to go into your website's /includes/ folder. Same with /admin/ if there are such files ... and so on ... the pattern repeats.
If a payment module is not showing in the list, and there are no errors on the page, and the sidebar appears for the first module in the list, then you've not uploaded the new module files to the proper folders.
If the sidebar doesn't appear, or if an error appears on the page, then you've likely uploaded the wrong files into the right folders; or you're got extra or renamed backup files etc in your /includes/modules/payment/ folder, etc.




