Ensure you aren't trying to use a ProPresenter 6 code for ProPresenter 7. They are not cross-compatible.
If your ProPresenter+ plan expires, your unlock code will still work for the version of the software that was out when your plan was active, but you won't be able to "unlock" newer updates until the plan is renewed. 5. Moving Your License to a New Computer unlock code propresenter 7
You can usually search your organization's email for "Renewed Vision" or "ProPresenter License" to find the original digital delivery. Ensure you aren't trying to use a ProPresenter