If they do not show in your
downloads folder then something might have blocked it, your antivirus or ISP (internet service provider) or browser.
Check your download section in the browser (most browsers show it if you press CTRL+J on your keyboard) please if they got blocked or had errors during download.
Or do you talk about you cnanot see them ingame in your addons list?
-> Read here please:
https://www.esoui.com/forums/showthread.php?t=8858
-> "Where do I need to install/extract the addon zip files to? Or what is the "/live" folder?"
Do the screenshot trick as described there
Or do you talk about Minion, the addon manager if you say "downloads"?