Hi,
Thanks for your interest in our plugins 🙂
Whether you’re using PRO or not, you need to include the address of a venue on the Venues CSV file, and not the lat/long.
However, by using PRO, you could make good use of Additional Fields and also display your events on Google Map.
Regarding the license, you could use it on a dev/staging site without it counting toward your license’s maximum allowed sites if its domain name is clearly a dev or staging site. You’ll find more explanations on this page: https://theeventscalendar.com/knowledgebase/using-one-license-live-dev-sites/
I hope this helps,
Cheers,
Jeremy