Read section 4.9 in the PBP3 manual, regarding how to set the configs in your code.

And I doubt the "Compile" button is greyed out, although it's likely that the "ICD Compile" button is, since you can't use the In-Circuit Debugger with a 12F675.

If you don't see the "Compile" button, go to View > Toolbars and check the "Compile and Program" option.