I've had this problem as long as I could remember but In my latest desperation to fix it, I reinstalled prepar3d v5 with no addons except for a few individual airports and ai-traffic. Still I see the runway markings are not correct at default airports. Along with the uninstall (and subsequent reinstall) I did the follow to the folders below.  

C:\Program Files\Lockheed Martin\Prepar3D v5 (or the modified install location)  I deleted

• %PROGRAMDATA%\Lockheed Martin\Prepar3D v5  I deleted

• %LOCALAPPDATA%\Lockheed Martin\Prepar3D v5  I deleted

• %APPDATA%\Lockheed Martin\Prepar3D v5 I deleted

• %USERPROFILE%\Documents\Prepar3D v5 Files I did not delete  

• %USERPROFILE%\Documents\Prepar3D v5 Add-ons I did not delete  

 

I have tried everything and I'm out of ideas. Any help?

Thanks,

Dave

Edited April 7, 20215 yr by tyda0501
I troubleshooted a new item and wanted to mention that

I found out what was causing the problem, Aerosoft airports! I have 3 Aerosoft airports all added to prepar3d V5 via the xml method. For some reason this is causing the issue at default airports. Now I have to find a way to fix this. 

Update!!! The specific problem was the "ASU Updater". I deleted that program and reinstalled all my aerosoft airports and everything is working!