I own Flash CS5 as part of CS5 Web Premium. The ONY part of CS5 web premium I have any interest in upgrading is Flash. The Flash upgrade costs $119, the CS5 Web Premium Upgrade costs $399 - so I downloaded the Flash upgrade and it will not let me upgrade Flash.
Customer Support is closed until Monday and I need to get work done!
If you own the Web Premium package, you have to upgrade the entire package. You cannot upgrade individual programs of it. The only way to upgrade individual programs is to have bought them as individual programs. You could try asking Adobe Customer Support for an exception, though I would guess you wouldn't be the first and they are probably very firm about this policy.
I should add that there is nothing prohibiting you from getting work done... you have a 30 day trial period.
Thanks - I called them and resolved it, after a little hustle on my part. Frustrating though...