If I have customers already booked can I change my prices and it wont change for them? or does it change their prices too? I want to honor their prices but change for the future customers.
Changing your rates does not affect any currently booked services or any pending services. I have found though that if certain modifications are made to a booking that it may change to your current rates opposed to the rates they originally contacted you for. You can easily modify those rates back down when you modify the booking or after you client modifies the booking. If you would like to offer your current rates to your client for future bookings as well, go to the booking, look at the details of the booking and select to lock their rates.
The short answer is no it won't affect them because they've already paid Rover.