Hi Nick,
it's fine that you could install the missing Chess Fonts and that Chessdiagrammer is running now properly!
I just added a function in the Service Manager, that offers to install all missing fonts. Maybe this can help other users, if this problem occurs again.
If you have any questions, please don't hesitate to ask.
The support is happy, if he can help solving problems.
Have a nice day, and have fun with Chessdiagrammer!
Kindest regards,
Lilith