@ armintz – This forum topic is over a couple of years old so some things have changed since this forum topic was originally created.
BPS Pro has built-in troubleshooting – all BPS Pro features can be turned On or Off for troubleshooting:
http://forum.ait-pro.com/forums/topic/read-me-first-pro/#bps-pro-general-troubleshooting
To completely uninstall all traces of BPS Pro:
1. Do a normal plugin deactivation and uninstall on the WordPress Plugins page.
2. Manually delete this BPS Backup folder here: /wp-content/bps-backup/
“Use the Delete wp-admin .htaccess feature on the Security Modes page.” means deactivate wp-admin BulletProof Mode, which deletes the wp-admin htaccess file.