Site and Admin crashed

Hi,
My site and admin crashed when I installed and activated Cyclone Slider 2. Everything with my site address is now a blank white screen. kjpencil.com
It could be related to this redirect which came up immediately after:
http://kjpencil.com/wp-login.php?redirect_to=http%3A%2F%2Fkjpencil.com%2Fwp-admin%2F&reauth=1
So…
How do I get to my admin so I can begin restoring my site?
Is there anything specific I’ll need to clean up after such a crash?
Is this a common problem for Cyclone?

Thanks lots!!!
KJ