The JSON becomes the profile and it presents the keys - are you able to select Add/Remove properties? if not there may be an error in the copy of the JSON - if you get it from here - https://github.com/macadmins/nudge/blob/main/Schema/jamf/com.github.macadmins.Nudge.json and then hit the copy raw and paste it into the "edit schema" section it should essentially be blank in for form and then you Add/Remove sections.
Thanks! That worked. Does this take the place of a Launch agent for timing? I want to have Nudge reminder users twice per day. Settings via the JSON below.

One additional question: I noticed after running Nudge via a JSON and the Launch agent that it no longer pops-up to remind the user even after updating the version requirement in the JSON under Jamf Configuration profiles.
The fix seems to be flushing the device in the Launch Package policy.
Is that the recommended solution if we need to reminder users to update to a newer version after previously reminding users to install a past update?