I would be fine with any of these options:

• If the download of GoG galaxy also downloaded the game installer
• If the options were all visible with a little blue button for each
• If the download were collapsed but we had a blue button to show all the version to install

With the current page, I've been bitten: download a few installers to go install them to my brother's PC. Had to re-download everything once there.

If I downloaded thoses thinking I was making a backup "in case GoG closed or removked my licenses", I would have been furious seeing I downloaded X times the same GoG Galaxy launcher.