To do this, simple access the relevant menu as follows:
MENU SETUP MANUAL TUNE SEARCH
Once you have carried out the search (which can take some time!) you will be taken into non-freesat mode, where you can view the channels.
To switch between Freesat and non-freesat mode you need to select the following menu options:
MENU SETTINGS STB MODE (press the right arrow to switch between the two modes then press ok)