I spent about an hour figuring out why my window would not "Maximize" Or Resize. The issue is with the 2d "Scene" Manager. The script automatically defaults to the screen size of the scene vs. the ones set by the user.
function menu_battlemap_setup()
if menu_battlemap_loaded = 1 then exitfunction
menu_battlemap_loaded = 1
if menu_battlemap_change_window = 1
SetVirtualResolution(menu_battlemap_base_width,menu_battlemap_base_height)
SetWindowSize(menu_battlemap_device_width,menu_battlemap_device_height,0)
SetClearColor(0,0,0)
endif
The AppGameKit Scene editor automatically generates this code (the menu_battlemap example is the scene's name, so this will be different for you. The SETUP() part is the same..)
All you have to do is make sure for each scene you change the variable "change_window " that loads the scene to "0" on the screen resolution IN EACH SCENE used. Then, remember to turn the Editor from "Read Only" so you can save the file.
I hope this helps someone else. Thanks!
EDIT:
Additional Note: You will have to REEDIT Each scene after making a change (the editor rewrites the variable flag after each modification with the original value).. Unless the developers have another solution available.

Watch \"StarCrash\" a 1979 epic film, make sure your not to sober..