Upgrade to Nero 2014 Platinum - wrong instructions to remove the older Nero programs ?

I have Nero 12 and I purchased the upgrade to Nero 2014 platinum. The confirmation email states that it is best to remove the old program before installing. I removed Nero 12 and download the new program but it doesn't work. I then saw that the code I am downloading is for upgrade, not a complete install. Is the instructions to remove the old version is wrong ? How do I proceed ?
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