Yes this is due to not utilizing the uninstaller to remove the software. If you can please post which operating system you are using I would be happy to inform you of the location and procedure to remove the software.
I'm running OSX 5.1.5 - if that helps?
Possibly still not completely sure could it be Mac OS 10.5 which you are using? The uninstallers should be located in Applications/Utilities/Adobe Installers.
Deleted the content, but without any luck - still asks me to delete the beta..
And yes, its a mac
Did you find the uninstaller at the location Jeff told you? Did you run the uninstaller before deleting it? If you have not deleted the uninstaller permanently, locate it on your computer, and use it to uninstall.
A few articles that could help you
Let us know if you still have problems.