Unable to access wp-admin after upgrade to 4.0.1 reauth

Hello,

I run several websites using wordpress, and generally the upgrade to 4.0.1 (on other sites I run) has been seamless.

However, with one website (thethreestrategies.com), after being kicked-out post-upgrade to 4.0.1 to reauth, I have NEVER been able to log back in. I have the plugin WordFence installed, and it sends me a notification saying that I have successfully logged in, but I still sit outside of the site and can’t get to its underbelly.

Using FTP, I have disabled all plugins (by renaming the folder names).
I have tried accessing it using different browsers
I have tried logging on using different devices
I have waited, hoping that some magical fairies would fix it (didn’t work)
I have had the website for years, so it has functioned well until this upgrade
I have other websites that have successfully upgraded to 4.0.1

Any ideas? I’m stumped, and I can’t afford the $125/hour that I’ve been quoted to fix this puppy.

And, I really really don’t want to rebuild it.