Enable renpy console, better guides are available if you search but in general
Open with notepad/notepad++
renpy\common\00console.rpy
Find the line
Code:
# If true, the console is enabled despite config.developer being False.
config.console = False
Change it to
Code:
# If true, the console is enabled despite config.developer being False.
config.console = True
It's case sensitive.
After that start the game and press "Shift+O" to gain access to the console.
If that sound too complex you could try the
Universal Ren'Py Mod though I just use the console and read the rpy files. More info is in
Modding Ren'py 101