I recommend using 1.4.1804, but if you have to use a version where macros and function overriding don’t work, you’ll have to delete the gameframe_macros.gml file from the extension using GM IDE (“expand” the extension resource, then right-click the file), rename the one use of __display_set_gui_maximise_base in gameframe.dll to be display_set_gui_maximise, and restore GUI size manually after calling gameframe_draw.