Having a similar problem. I re installed FSX not deleting any add-ons. I have the PMDG 737 NGX as well as 747. When I attempt to load the 747 I receive this pop up on the main screen
"Can't find PMDGOptions.DLL"
I am able to load the 737 NGX but when it is finished all numbers and map are missing. Everything else works. Here is a Screen Shot. As you can see the IRS is aligned and all other systems are functioning properly. Not shown in this picture is the flight plan on the middle screen. You can see way points and magenta line but not the map