How to clear app data in Open Office?

Hi,

A few days ago Open Office wasn't responding or something and I force quit the app. Now, when I open it again, it comes up with this query window.

No matter what I click, "Don't Restore Windows" or "Restore Windows", that windows won't go away. Thankfully I can move it over and still use Open Office, but it's pretty anoying, and it won't let me quit the either, I have to force quit it.

Is there a way to clear the apps caches/data or something so it doesn't do this?

Thanks!

Daniel