The display blocking in the configuration menus is a known problem, reported by other users, it is very pronounced on SW02.
It is then necessary to disconnect the battery.
It also happens on the 860C, but it's less frequent. It also happened in the 860C version of Casainho.
Unfortunately I could not figure out why, because when it happens, the display freezes and debugging is not possible.
With 860C there is a method to avoid this inconvenience,
Only change one menu at a time, then turn the display off and on again before entering another menu.
Try if it also works with SW102.