There isn't a trial version of 3D as such, in terms of you can't download the 3D version and run it using your live RadarBox data.
You can download the 3D version and run the demo which gives you old data so you can view what it looks like and have a play around.
The 3D version is basically the 2D version with 3D added on, if haven't purchased the 3D version but run the 3D software it reverts you to the 2D version.