I have just installed appointments+, I set myself

Hi, I have just installed appointments+,
I set myself as a Service Provider, but I dont think I need to since I will be the only service provider. After removing myself, the calendar shows no available appointments. How do I reset this as I understand the Service Provider field is actually optional... Also I am trying to import unavailable times from my Google Calendar and this does not seem to have worked. I'd love a little assistance. Thank you;