Radiant Question

I downloaded Radiant about a week ago, and yeah. I have some questions.

1. What is the simplest version of Radiant I could find, please note: I am a person who prefers simplicity.

2. Why is it when I make a box, it says there are no shaders?

Sorry dude, I'm stuck with a Mac :/

Mmm, first, me i like 1.5, but some people prefer 1.4, so honestly, it's the first which comes on you ^^.
Then, for the shader thing, i think that it's because you didn't load textures yet, so you have to load them first, just be directiring your gtk to the gamedata folder of your jk2, when gtk starts.