Robert,
You need to delete, or at the very least uncheck, your EZ Scenery folder. All of the EZ Scenery objects are already included in the RTMM libraries. The RTMM library was updated a number of years ago so that all of our objects could be compatible with P3D. Don't worry, by deleting your EZ Scenery folder you won't hurt or lose anything in the way of objects.
After removing the EZ Scenery folder, what you should do now is to go back to the root directory's texture folder and rename "ga hangar ss 3a.dds" to "ga hangar ss 3a.dds.off". (This is a safe guard in case something goes wrong in the next steps.
Now make sure that you have "ga hangar ss 3a.dds" in RTMM Required Libraries Part I\EZ Scenery LibraryFSXP3D 6-7-14\EZ Scenery LibraryFSXP3D\texture
If it's indeed in there, and it should be, you can safely delete the "ga hangar ss 3a.dds.off" from the root directory texture folder.
IF by chance the "ga hangar ss 3a.dds" file in RTMM Required Libraries Part I\EZ Scenery LibraryFSXP3D 6-7-14\EZ Scenery LibraryFSXP3D\texture ends in "off," remove the "off" so that the file reads "ga hangar ss 3a.dds" as it should.
this sounds way more complicated than it really is. I'm just trying to cover all of the bases.
For what it's worth, there have been scores of others who have had the same issue over the years, so you aren't alone! it comes down to having duplicate or overlapping object libraries.
If you need further help, just ask.
Steve