Hello seen MechJeb2 in some videoes and decided to try it out.
So the parts load and such but there is no GUI at ant point in the game.
Orbit around any planet anywhere in space.
No tab on the left to open it either.
log https://gist.github.com/Neil5043/9634302

You installed it wrong. You should unzip the zip in gamedata
It should look like
KSP

• Gamedata
  • Mechjeb2
    • Part
    • Plugin