Cannot create / delete new worlds.

[warped tulip]

For some odd reason everytime I want to create a singleplayer experience apart from my Co-op world, I am always put back into my Co-op world. When deleting every world in my game, & relaunching, all of the deleted worlds return. I have turned off my internet, restarted the game, reinstalled. I am lost.

[last trench]

delete it from the folder

[warped tulip]

I did, straight from the app data folder. No fix.

[last trench]

use a save editor to delete it