Yes, the Pledge Manager was reopen in September: https://gamefound.com/en/projects/awaken-realms/tainted-grail-kings-of-ruin
We don't have a closing date yet, we will announce it in the Gamefound updates.
Please note that it's not possible to change orders that have been shipped or partially shipped already, if you'll add more products now, a new order will be created.