You can still patch the game, if you edit the launcher settings to change the download method.
This will redownload the full game but also fixes many related issues, like extremely low download speed etc.
Open your launcher.settings file with the editor and change the following:
, "PatchingMode": "{ \"swtor\": \"SSN\" }"
, "bitraider_download_complete": { }
, "log_levels": "INFO,SSNFO,ERROR"
, "bitraider_disable": true
Rename/delete the Bitraider folder.