You've probably tried this or something similar, but worth a shot.
- Close SWTOR
- Search for the Launcher settings in the SWTOR folder
- Open in notepad/whatever
- Find the matching section in the file and delete the 4 lines and replace with this:
, "PatchingMode": "{ "swtor": "SSN"}"
, "bitraider_download_complete": { }
, "log_levels": "INFO,SSNFO,ERROR"
, "bitraider_disable": "true"
- save the file
- go to C:\Users\Public\Documents
- delete the Bitraider folder
- uninstall Bitraider via add/remove programs
- run SWTOR and see if it works
Hope this helps. Good luck!