Filbertsplosh on "[Plugin: W3 Total Cache] WP Admin dashboard gone blank"

I have also just tried to update to w3TC 0.94 the update got as far as deleting old version then locked up and the screen went white. Tried logging back in, but can't even log into my admin area. Tried searching for my site http://www.paulpriestley.com on line but clicking the hyperlink just generates a blank white page.
What can I do to resolve this?
Cheers