There is a workaround.
Go to your Install Folder then → \Official\OneStore\fs-base\worldmap, make a backup of the worldmap.xml (just in case) in there, then open it and edit the individual entries.
Search for
TT:MENU.WORLD_FILTER_TYPE_NAVAID_DESC
two lines underneath there is the line
OnOff>OFF</OnOff
change the OFF in the middle to ON
Search for
TT:MENU.WORLD_FILTER_TYPE_RNAV_FIX_DESC
two lines underneath there is the line
OnOff>OFF</OnOff
change the OFF in the middle to ON
You probably have to redo this after a patch.
I hope that helps.
Credits to tclayton2k for the workaround