I bought and installed Appointments+ but when I try to add

I bought and installed Appointments+ but when I try to add a third service, I'm told to upgrade as if I have only the free version.

Also, I need to know if users/service providers can set their hours in their own time zone. Also, will students see the schedules according to their own time zone?

I have tutors and students in different countries.

Thank you in advance for the info.