Hi Jason,
When you bought the full version, you got a download link for the program and an activation key. Correct?
Did you first try uninstalling the trial version completely? Once it is completely uninstalled, then try installing the version downloaded from the online store.
Once the installation is done, then input the activation key when you first launch the program.
Just suggestions on the normal procedure. Please let us know if this is what you did, or if you tried another way.
Regards,
David