After your Free Thirty Day Hosted Demo expires you can't extend it any more.
Demo platform is here to test the system and see it's features in action. We hope that you will have enough time to check everything up and find out if activeCollab meets your business requirements.
If, in some cases, you still need more time, please contact us and we will see if there is anything we can do. Effectively, the 30 day demo is the most you can get, but we understand that sometimes difficult circumstances can arise, so we will hear you out and do our best to help if we can.