If you use the "update patch" on your current install, you must delete any "scripts.rpa" files from the game folder.
Make a
"
While running game code:
File "renpy/common/00start.rpy", line 207, in script call
call _gl_test
File "renpy/common/00gltest.rpy", line 445, in script
$ __gl_test()
File "renpy/common/00start.rpy", line 207, in script call
call _gl_test
File "renpy/common/00gltest.rpy", line 445, in script
$ __gl_test()
File "renpy/common/00gltest.rpy", line 445, in <module>
$ __gl_test()
File "renpy/common/00gltest.rpy", line 359, in _m1_00gltest__gl_test
_gl_performance_test()
File "renpy/common/00gltest.rpy", line 384, in _gl_performance_test
ui.interact(suppress_underlay=True, suppress_overlay=True)
IOError: Couldn't find file 'images/events/window_icon.png'."
0.5a with script works fine