Nero 7 update UNINSTALLED Nero 7

I just downloaded and installed the Nero 7 update. At the end of the long process, it said it couldn’t find a certain file in the CAB and was rolling back the installation, and said I should try to update again later. But when it finished, I discovered it had completely uninstalled Nero 7 from my system. I no longer have an app to update; it’s all gone. WTF?

BTW, it’s 3 months and counting since I sent in my competitive upgrade rebate form to Ahead. They say it’s still in processing. I switched from Roxio for this? :a