I've solved the issue. I forgot I bought xplane 10 a while back, so I just installed xplane 10, and pointed navigraph to it. I was able to build the database in Plan-G. I'm good now. Thanks.

I've made a folder on my desktop called xplane. I put a notepad file named X-Plane.exe I pointed navigraph installer to that folder, but plan-g just says that is preparing the database, endlessly.

Is it possible to use navdata from aerosoft navdata pro instead of navigraph?

I've seen a few of the previous threads asking about navigraph/aerosoft navdatapro for updated plan g's navdata. Is this currently being planned or not an option?