@jafo88fan The troubleshooting advice for you is basically the same as above. You might start though by clearing the cache for Internet Explorer. Even if you never use it, the launcher does for some purposes. Be sure to uncheck the box to preserve data for favorites.
clear IE cache: https://kb.wisc.edu/page.php?id=15141
Missing packs sounds like an Origin issue; try clearing its cache, and if that doesn't help, uninstalling and reinstalling Origin itself, which wouldn't affect your installed games.
https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/
https://help.ea.com/en-us/help/origin/origin/manually-uninstalling-origin/
If none of this helps, it's a good idea to clear the caches for IE and Origin (again) and then pull your entire TS3 game folder out of Documents and onto your desktop. When you launch the game, a clean folder will spawn with no content. Do your packs show up then? Are the worlds that come with your EPs available for a new game at the Main Menu? Your store worlds wouldn't appear—they'd still be in your old game folder, along with your saves and other content.