There are multiple important questions here.
I will start with a short explanation of different options. For simplicity, this is what you will see when you click on uipath.com:
Option 1 and 3 will forward you to the same Public Preview of our platform.uipath.com.
With option 1 - Community Cloud Account, you can:
- have maximum 1 Orchestrator instance
- have 2 Studio developer licenses and 3 robots
- you can use the Orchestrator for production if your company is smaller than 5 million $ in yearly revenue or has less than 250 machines
With option 3 - Enterprise Cloud Account, you can:
- request more licenses
(in fact, requesting licenses will convert your account to the Enterprise one)
- create multiple tenants
- have unlimited licensing for studio and robots
- And from the agreement: “The Enterprise Account allows SMB and LB to evaluate its suitability for their internal business requirements and non-profit purposes (such as education, hackathons, individual or institutional research, trainings, private demonstrations of UiPath’s software). The Enterprise Account is not available to individuals.”
Now, a bit about option 2 - the 60-day trial. This is the option you will need if you want the trial key that lasts 60 days.
With this, you can:
- install Orchestrator on your own infrastructure
- license it with the 60-day trial key
With all that said, I think your scenario is quite simple. Simply make sure your version of Studio on all environments is the latest Community Edition 2019.7 and you should be good to go. I have received the same error while trying to run a process developed in 2019.7 on a machine with Studio CE 2019.6.
As to the trial keys, I would advise to simply evaluate using either option 1 or 3. This way all you need to do is connect your machine to Orchestrator and you are good to go license-wise.