If I were you, I'd delete the whole vault folder and re-update. It sounds like you have some issues with permissions on that folder or something.
You shouldn't be having to download updates manually anymore, Forge auto-updates are working great for most people.
If re-downloading the whole vault doesn't fix it, you might want to check with support on Discord.
If you don't have time to figure out that issue, you can also subscribe to each extension to get an email when they're updated.
Sign up for Github, then go to the "Watch" button and pick "Releases Only"
https://github.com/isaacs/github/iss...ment-442385230