If your OpenOffice crashed running Apple OSX, you might run into a problem where a dialog is asking you wether you would like to restore your old windows / documents.

When you click one of the two options, nothing happens.

You can solve the problem (make a backup of the folder before deleting it):

THIS IS ON YOUR OWN RISK!

Quit open office (using task manager or alt+cmd+esc)
Open Terminal
cd  ~/Library/Saved Application State/org.openoffice.script.savedState
rm -rf *

That will delete all content of that folder.