There are button combos to set each address.
From the docs:
If using more than one Ansible connected to Teletype, the II address can be set by holding the preset key in combination with Key 1 and Key 2. There is no visual confirmation, simply hold the combination for 2 seconds. The set address is saved to flash and will persist with power cycling.
The address is set according to the following:
Address Key 1 Key 2
0 off off
1 on off
2 off on
3 on on
Mappings for input and output are shifted for each address:
Address Out In
0 5-8 9-12
1 9-12 13-16
2 13-16 17-20
3 17-20 21-24
Edit: You can only have one instance of the individual apps at a time. So there can only be one Kria, or Cycles, etc.