Do not remove all user-developed content, gateways, scheduled refreshes, etc when switching from Pro trial to purchased license
We worked with Power BI Pro throughout the free trial period. We then purchased licenses, and applied them. Everything we had developed with the trial version was removed when the licenses were applied. This included our gateway, scheduled refreshes, etc.
I've never had this happen when moving from a trial version to a purchased / production version. I'm now concerned that we could face this again in 12 months when our current license expires and we switch to new license keys.