Unload skybox files

Dear community,

Is it possible to unload skybox files somehow?
My scenario: I’ve loaded several skybox files and saved the state. Now one of the files is corrupt and paraview throws and error, which is fine. To solve it, I would like to remove the file entry. But how?

I know, I can edit the state file and text editor and remove the entry. But that’s not convenient, I think.