[Silent Steel]

I'm slowly beginning to suspect a corrupted JSGME install, don't be alarmed.
In case you'd like to check this - follow these steps (Credit goes to Webster who put this instruction together)

Step 1
Deactivate all your game mods with JSGME

Step 2
Move the "MODS" folder found in your games main directory folder
to your desktop so it is no longer there (or just delete it if you don't need the mod files there)

Step 3
Run JSGME in order to create a brand new "MODS" folder in your games main directory folder

Step 4
Replace your mods in JSGME by opening the "MODS" folder you moved to your desktop and copy the mod folders one at a time in the desktop's "MODS" folder and paste them into the new "MODS" folder you just created in your games main directory folder

Don't move the whole desktop's 'MODS' folder - just the mods - or you will move the corrupted backup files too.
Moving the mod folders one by one avoids any chance of moving the corrupted "hidden" backup files along with them.