Hey Roger and thanks for getting in touch!
I’m afraid it’s an all-or-nothing sort of thing with recurring events and Events Calendar PRO. Purchasing PRO is the only way to get the recurring event functionality.
You might consider getting either a Business or Agency level license if you plan on supporting more clients with calendars — that would allow you to get more mileage out of a single license rather than having to pay for each instance of PRO.
@bingdesign — you can grab the iCal Importer add-on here and, yes, it can be used to import events from Google Calendar into WordPress. Please note that it is an importer rather than an exporter.
Does this help answer your questions? Please let me know. 🙂
Cheers,
Geoff