can't log in password protected zencache

Hello,

I’ve installed password protected and after log out from admin panel I can’t log in.
I’ve tried to change the plugin name (via FTP) but it doesn’t make any diffrence.
I’ve tried on Mozilla, Chrome and IE.
For now I can log in to admin panel and to to the website (password protected)

And now I have been locked out due to too many invalid login attempts.

I have installed ZenCache.
Any ideas how I can fix it?

Best regards.