I have version .90 of ksp installed with mechjeb2-2.4.1.0. I can see ksp loading the mod when i first launch it. Once i go into the game I do not see the mechjeb tab anywhere. The mechjeb2 folder is currently in the gamedata folder as required. I have also tried a few different versions of mechjeb hoping that would solve the issue.

Did you put the AR202 part on your ship ?

I am officially an idiot. Thank you very much