My gmod extensions are messed up

For some reason, between last wednesday and thursday my extensions got messed up. What I mean is that a while ago when I opened Garry’s Mod and clicked open the extensions menu I could see all my essentials and most if not all of my mod and steam game content listed.

When I open the list now I only see the essentials and when in Game I can see the spawn icons and folders but can’t spawn the props (for example Neo Tokyo and Dark Messiah), even though I practically changed absolutely nothing and all the files are still in their original folders.

Anyone got any ideas? Thanks.