Once you've physically installed your IntelliClimate, switch on the power. Check that the power light on the front panel is on and that the LCD display has some information on it.
If you have more than one new controller, connect their USB cables one-at-a-time and when the software asks, provide the requested information. For new or replacement controllers, you'll be asked which grow room it's located in and then to give the controller a name. Use a short meaningful name like Doser1, Climate2 etc so that understanding which device is located in which area is simple to understand as you add more devices.
Once this has been done you will see readings from the controller appear in Intelligrow showing that communication has been established successfully.