The launcher is downloading a 10GB patch. I tried to get on for the first time today just before the server went down. It downloaded a small patch when I started the launcher. I could start the game without issue over the past few days. Now that the servers are back up, it's attempting to download a 10gb patch.
While the servers were down I decided to take advantage of the time to move STO off my external HDD onto my internal one in the hope to increase performance. I am not sure if this has caused the issue. I've spoken with a few others, and they said they have not needed to download a 10GB patch.
Unfortunately, if I am required to download this patch, or to redownload the STO installer, I will not be able to do so, as STO related downloads have sucked up much of my monthly bandwidth already.