Can't kill App (quit) in OSX highSierra

Hi there, I have the following Problem and Need help, pls.

The latest Version of LO and OSX are running. Installed one day before.

I’m unable to quit / delete /move the LO App because the app has non existing documents in its Cache from an external file server. Something happened with the (SMB or AFP ?) Connection. It Shows me the “opened” documents but I am not able to do anything with the app. The first I did - deleting the user Folder in the user-library. A look into to terminal and the running apps didn’t Show me any app which Looks like Libre Office. So the idea to kill it there didn’t work.

DO you have any idea?

the app executable begins with soffice - don’t know if that’s helpful

thx. but i didn’t find any term like “Office” … “libre” and so on. no activity of this app. like a ghost