it seems that you have in android system locked Soft keys (Home, Back and More button) because of them you have the screen size 540x922 and the strings in sys txt that zervdim is suggest do not work - the soft keys allways are shown.
Two ways -
first ...search for a app to can manage soft keys.
second... is nothing for you, when I read you can not find save folder:-)) (small joke, but second will be to open data, then go to ui android folder, open multimode ini and place there your screen resolution...)
change multimode ini is here often explained and discussed - look a little bit
For multimode ini it is needed to know landscape and portrait resolution -