Do you have the following line in your config.pro since you reloaded?: protkdat C:\Ptc\efx6.0\text\protk.dat Obviously your path may be different, but this points Pro-E at the folder where the protk.dat file is for your EFX module. Without it, it will be greyed out as if it doesn't exist.
Chris Benner
Autodesk ® Expert Elite