Replacing AXC F 2152 to AXC F 1152 in Demo Project

I want to try this demo project using AXC F 1152 Simulator:
The problem is that I can’t replace AXC F 2152 used in this demo to any other device (see screenshot below, ‘Replace’ menu item is disabled):
If I delete AXC F 2152 and add AXC F 1152, all HMI configuration (pages etc.) is lost.
What am I doing wrong? How to replace only PLC model, leaving all other parts (program, HMI etc.) unchanged?

You have to find the controller in the right hand side first, then COPY it.
Afterwards you will find that the “replace”-command is enabled.

(i know, not very intuitive)

Thank you. Yes, it was not an obvious solution.