Give this a try in case it is related to a similar issue.
1.Close the game and the launcher.
2.Navigate to you your Star Wars: The Old Republic installation folder. In a default installation these files can be found here:
•64bit: C:\Program Files (x86)\Electronic Arts\BioWare\Star Wars - The Old Republic
•32bit: C:\Program Files\Electronic Arts\BioWare\Star Wars - The Old Republic
3.Delete the "retailclient_swtor.version" file
4.Restart the Launcher and let it patch the game. A few files will be downloaded but the process should be swift.
5.Proceed to login to your character.
Well, I tried your suggestion. Deleted the retailclient file, restarted the launcher.....
and now I can't even get to my character select screen!! The game crashes to the desktop before I can even reach the selection screen now!!! God I am hating this game now!!! What's sad is I just paid to renew my subscription and now I can't even play. And I know EA will just say "sorry about your luck, we aren't refunding you anything for time you haven't been able to get into the game."