Fireworks CS6 Serial Number issue

[deathofthegods]

I've just purchased Fireworks CS6 and went to install it but it keeps telling me that the serial number that I have is valid but it cannot find a qualifying product on my computer and gives me the option to change to CS5,4,or 3. This was a download.

[Ned Murphy · Accepted solution]

What you describe would indicate you have purchased/acquired an upgrade version, not a full version... it is failing to find the preceding version that qualifies you to activate the upgrade.  It is possibly then asking you to provide the serial number for the preceding version as an alternative to having it installed.