Hi!
You should just go (from the principal menu) to "flight planning",select your departur and arrival airports.
Then,in the same page,go to the point number 5.
On the map select all intersections and/or radio aids you want,by pressing over with your mouse.
You'll have a list of radio aids.
Now just press over that one you've chosen,and you'll have the frequency!!!!

Easy,no?!

Cheers!!