[SOLVED - needed SDK repaired] ATC selection greyed in 4.2

[majapahit 3]

Updated to 4.2
Now the options in ATC show, but are greyed .. ?

What am I doing wrong.

Using FSUIPC and FSTramp addon, when disabled, still same problem.
I see in the update specs 'The ATC window now longer processes key commands when key modifiers (Shift, Ctrl, Alt) are held down'
but I do nothing of that kind, the numbers and selections are simply greyed and nothing happens when either tapping the numbers, or mouse clicking the line

?

[SOLVED - need SDK repaired]

never mind
had accidentally restored drive from old backup

missed SDK

FYI:
for ATC you need SDK installed

 

[rgerdes 4]

I also had this problem. Finally uninstalled 4.2 client and reinstalled it and now the atc is working, at least for the moment.

[aeronauta 67]

You do not need the SDK to run P3D any version.

 

Jorge