I have successfully managed to implement Cameron's workaround !
My setup:
I have previously updated to X-Plane 11.50 and I have Navigraph installed
What I did:
Folder X-Plane 11/Resources/default data:
deleted CIFP folder
copied all earth_XXX.dat files and the CIFP folder of Camerons's default data to X-Plane 11/Resources/default data
Folder X-Plane 11/Custom Data:
deleted all earth_XXX.dat files
deleted CIFP folder
copied all earth_XXX.dat files and CIFP folder from Cameron's default data to X-Plane 11/Custom Data
And voilà: both ILS and VOR are working perfectly again!
In addition please keep in mind:
Don't forget to backup all folders before changing/overwriting/deleting them, you might need them to revert if this fix does not work in your environment.
I have just tested the TBM 900 so far, so I can't give you any advice if any other addon will be working or not.
Many thanks to all contributors!
