Did you install your expansion packs into RF7? When you upgrade, you are not overwriting the old 5.5 software you are actually installing a separate copy of RF7 along side your 5.5 installation. You will now have both 5.5 and RF7 installed and you can use both or uninstall the older version if you need to save space. You will need to import/install any expansion packs and Swap file aircraft into RF7.