Here's what I just did, and it worked for me right away.
I open Do-more Designer, Create a new Offline Project, Do-more Simulator.
Create a new Device, Modbus TCP Client, "ClickTest"
Add two MRX instructions to $Main, one reading coils, one reading holding registers.
Populate Click's IP address, coil offset and length, holding register offset and length, etc.
Write to Simulator, and put Simulator in Run mode, enable X0, and it works for me.
I open Do-more Designer, Create a new Offline Project, Do-more Simulator.
Create a new Device, Modbus TCP Client, "ClickTest"
Add two MRX instructions to $Main, one reading coils, one reading holding registers.
Populate Click's IP address, coil offset and length, holding register offset and length, etc.
Write to Simulator, and put Simulator in Run mode, enable X0, and it works for me.