Advent MP82 camera settings

Question

While changing the settings on my camera I managed to change the battery setting from Alkaline to NiMH. I am not using NiMH so now when I switch the camera on it says "replace battery" . I cannot change the setting back because the camera wont work. Is there anyway I can reset the settings? Note: the batterys are new and worked perfectly before I changed the settings.Please help I am going on holiday next week and need my camera.