Unreal Engine 4.21.1 missing from library

So I just downloaded UE4.21.1 last night, only to find that it’s no longer in my library this morning.
Not only that, but the latest version I can download is now only 4.20.3, and 4.19.2 keeps partially installing… on it’s own.

Saw a similar unresolved thread about an engine version going missing from a library for 4.20

This is particularly frustrating, so any help would be appreciated.

Well try getting the source from github, that should be a true alternative but not a fix for your issue.

I would also look through your files to see if you can’t find where it might have been placed, those downloads will still be parcial and taking up space.