Thanks!
Now I have a question not about any of this. More on the creation of ages (I may be going too fast, but I'm just making "Practice age" and will delete it)
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I've installed everything needed into the right directory. I put PyPRP into the scripts directory and extracted it. But when I click on PyPRP > Create book I get this error:
No module named for PyPRP.
EDIT: It seems to be an error in the python, although that can't be right, as PyPRP is working for other people...