What is the difference of NeedSecure Lite and Pro version?
NeedSecure Lite version has a little limited functionality compared to Pro version. Due to these restrictions the Lite version does not have the ability to allow/deny access to any protected directory for all members, mass newsletter sending, grant/revoke access for all future members, allow/deny from all, language files, and email templates are not editable from the admin area. NeedSecure Pro version has no functionality restrictions. The full list of features is available here.