Car hire pick up time.

[Omega1]

We have a rental car booked with Dollar through Auto Europe with a pick up at Fort Lauderdale airport. Our flight times have changed slightly and will be picking up at 20.30 rather than 19.00. Auto Europe will not amend the pick up time without cancelling and rebooking and,of course, prices have gone up.
Does anyone know how much flexibility there is on the pick up time - the reservation is prepaid and I have updated my flight details on the Dollar site.
A Google search shows that there is a two hour window for pick up but can’t find anything on the Dollar site. Any information, experience or help appreciated.

[mickchick]

There is no need to amend your booking. In practice, the pick up time is the time you arrive at the desk and your hire starts from that time. You are good to go from whenever you get to the desk - after all, your flight could have been delayed or you could have been held up in immigration; nobody will bat an eyelid at the desk because the pick up time on your booking form is irrelevant.