Caveat: I am bitter and frustrated and going to be lashing out insensitively.
For two weeks I have been fighting to regain access to my clients website from which I have been locked out.
If I attempt to login I get 404 not_found.
If I delete the plugin and htaccess files, I get 403 Forbidden message.
The hosting company denies its their problem for the 403 and I am getin ZERO information from this support forum. If I must, I will rip out the whole friggin site, at my expense, and rebuild it.
It is reprehensible that there is no CLEAR, DEFINITIVE ANSWER to lockout problems many of us have ... and there are a lot of people here with lockout issues.
I suggest a STEP-BY-STEP TROUBLESHOOTING POST that is stickied, by the author, to which we can all refer.