If you can get SD to open after reinstall, then don't open that project again. Start from scratch. If you need to see what you have done so far, look at the exported pages. And if you don't have any exported pages, or if they don't open either, I can send you the exported project that I've made here.
Inger, Norway
My work in progress:
Components for Site Designer and the HTML Editor: https://mock-up.coffeecup.com