Do the standard BPS troubleshooting steps below or do the complete BPS removal steps to delete BPS.
http://forum.ait-pro.com/forums/topic/read-me-first-free/
htaccess File Troubleshooting Steps: Unable to Login to Your Website:
1. Use FTP or your Web Host Control Panel File Manager and delete the .htaccess file in your website root folder and the .htaccess file in your wp-admin folder.
See Custom Code Note
2. Log into your website, click the BPS AutoMagic Buttons and Activate all BulletProof Modes. Or if you are removing BPS do steps 3 and 4 under BPS removal steps.Note: These steps above apply to issues/problems that are directly related to your root .htaccess file. If your are unable to login to your site due to an issue/problem with Login Security, rename the /bulletproof-security plugin folder, log back into your website and correct the issue/problem. For additional troubleshooting steps for BulletProof Security see: http://forum.ait-pro.com/forums/topic/read-me-first-free/#bps-free-general-troubleshooting