AgentPress – StartUp problem

I just bought AgentPress and have it installed.

Following the instruction, I have to add plugin ‘dsIDXpress’ and activate it. Then, I got this error message:
“In order to use the plugin, you need to add your activation key to the dsIDXpress activation area”

What do I have to do next – sign up a paid account with dsIDXpress?
What is the support of this pluggin?

I started adding a few taxonomies and 1 listing. The Preview looks nothing like what I saw on the Agentpress demo (when there are 3 columns of listings)
I read that I have to import a xml file (agentpress.xml) but when I tried to import agentpress.xml, it said:
“Upload the data file (.json) from your computer and we’ll import your settings”
I cannot find any .json file … I am lost

Plse help me. How can I have the pre-set theme format as depicted in the Agentpress demo in the easiest way?

Thank you.