Is FSDT Live Update not able to check some sort of date or ? state of the FSDT family to not download all the same files again? Or I suppose, there were some changes you did last night that it found this morning....
The Live Update is not so rudimentary to check for a "file date", which can be altered, misleading, depending on timezones, etc. It checks the actual MD5 of each and every file, comparing the one on your system and the one on the server and, it will download something only if it's different or missing.
So, if it was downloading lots of stuff in your case, it can only means that:
- Many files were different, which means you didn't update in a while
OR
- Many files were missing instead, which also means you didn't update in a while (assuming you haven't removed anything, of course).
Another possible reason for continuous downloads, is that something like an antivirus or a firewall is blocking the Live Update from downloading files, so they are still found outdated. In this case, you must add the Addon Manager folder to the antivirus exclusions.