It sounds like you may have installed a trial version at one point and it is not uninstalling completely. Try the following...
After uninstalling deskscapes, manually delete the "C:\ProgramData\Stardock\Deskscapes" directory and the "C:\Program Files\stardock\object desktop\deskscapes" directory if the uninstall process didn't delete them.
Install Deskscapes 1.02
It should work at this point