Unfortunately, we currently do not offer a demo version for C.A.T. as it requires your API Keys to be controlled through our servers for add and remove at the end of your demo period and this would scare many of our customers off. We have given a promise of never communicating to any third party servers and we intend to keep that promise. But you are always free to sell your copy of C.A.T. Bot core if you are not using it. Just contact us through the community pages or email@example.com and we will arrange a transfer in between parties.