Hi John,
At the time of asking the Mendix Studio Pro version listed on your question was 8.8.1. I suggest downloading the latest version of Studio Pro (currently 9.9.1) to get it out of the box without a licence.
The only limitation of this – an app can retrieve a total of 1000 OData objects per day for each runtime instance. For the purposes of the "Share Data Between Apps Using the Data Hub Catalog" course (or other prototyping) you should be covered.
John