Backing up the original panel.cfg, then renaming the CIVA_panel.cfg to panel.cfg, should allow everything to work properly. You will need to go to the 2D Cockpit (the default keyboard shortcut is F10) to initialise the CIVA INS so it works.

Note - I moved the gauge04=../civa/INS!Config, 0, 0, 0, 0, csx701
from [Window00], and added it to [VCockpit01] gauge27=../civa/INS!Config, 0, 0, 0, 0, csx701, so that the CIVA INS initialises as soon as the 707 is loaded into FSX, without the need to press F10 to initialise it.