HI there!
What tutorial is that you are talking about? The plugin help file?
The Bitmap font pro don't need the font Manager. It will also work like a font Manager, but using Bitmap fonts only.
I'm not sure about the font height. If I record well, the free version does not support escape codes that changes the font size, so I believe it does not calculate a different font height properly.
I can't take a look at this now because I'm busy with the IGMC.