Uninstall first! (Score 5, Informative)

Make sure you uninstall any old versions before installing the new version. Its in the faq.. well hidden, but i've had no problems when uninstalling then re-installing. Make sure to back up, but your savings should be saved as they are not held in the same area as the executeables and whatnot. I have had problems just upgrading, but i've been problemless since i've done the above.