If you want to use the freeware scenery Denmark Scenery v1.4 together with Vidan Designs Danish Airfields X - Randers, you will need to deselect "Randers Airfields (EKRD)" during the installation of Denmark Scenery 1. 4
If you have already installed Denmark Scenery 1.4, you will need to uninstall it.
To uninstall Denmark Scenery 1.4, run the installer again and select “Remove” (or use the Windows Control Panel Add/remove programs).
Then reinstall Denmark Scenery 1.4 and during the installation, choose "Custom" setup. Here you will have the opportunity to disable various elements of the scenery, including airports and airfields.
Make sure that you under "Randers Airfields (EKRD)" selects the option “Intire feature will be unavailable”, like on the image below: