Can't figure out how to reassign joystick inputs

[BoomDoomTomb]

Trying to get the game "Sundog" to run on my laptop, but it appears to use joystick buttons and inputs. I read your instructions that Appler uses a virtual joystick and that the commands can be remapped, but I can't figure out how to actually access that option. I press F4 to get to the virtual keyboard screen, but then my only option seems to be to press a keyboard input, which then asks me to select another keyboard input to remap it to.

I can't seem to find a way to access the joystick inputs and button 0 and button 1 from my laptop (which doesn't have a numpad). Is there a way to access the ascii remapper without first pressing a keyboard input? I just want to remap the joystick and button 0 & button 1.

Thanks!