Help Please...iWeb won't launch properly

Hi all
I'm new here.
Hoping someone can help me.
I was using iWeb this morning to update my site and it just closed apart the launch bar along the top and the inspector box. I tried restarting my mac but it still won't launch fully. This happened to me a few months back and i found a fix online where I had to move a file on my mac and it fixed it but i can't find the fix and I've googled loads. Anyone else know it please ?