There's one thing you must be aware of. Your copy of the public beta will likely crash when launched. If this happens, try two things:
- The old standby: trash preferences.
- If 7 won't run after this, this is because XPress needs a "Preferences" folder to exist inside the application's home folder and the installer, for some reason, does not create it. Create a folder called "Preferences" in the QuarkXPress 7.0 application folder, and it should start up just fine.