I experimented with the preview tabs for the custom design package and it worked fine. But after I purchased it last night, it stopped working. When I click on customize on the drop down menu or get to it from appearance in my dashboard, my blog page comes up, the customization sidebar appears on the left of the screen - and then my page disappears; all that remains is the black background. I've emptied my cache, closed and reopened Safari, refreshed the page countless times. I can change the background color, but that's ALL I see. A big blank page in another color. Useless at the moment.
The blog I need help with is 52at52.net.