Can't click on anything in VAB

[THX1138]

I can't select any of the existing structure in the VAB. The problem applies only to this specific structure. If I load a different structure, it doesn't have this problem. Reloading the game and reloading this structure, the problem persists. I can add things to the structure but I cannot select anything to move it or delete it. Normally a part highlights green if you mass the cursor over it but that isn't happening. What's going on?

I uploaded the structure in case my description is unclear.

Edit - the problem was resolved by entering 'Action Groups' and then returning to . Also, there's no way for me to stop this hyperlink formatting extending beyond its originally-intended bounds. The girders still can't be clicked/edited though. This should probably be handled as a bug.

Edited January 29, 2015 by THX1138