Zotero not opening on desktop - says it is already open
When I try to open Zotero, a box pops up that says "A copy of Zotero is already open. Only one copy of Zotero can be open at a time." However, I cannot find any other place where Zotero is open and running. When I go to force quit, zotero is NOT an available application to close, indicating that it is NOT open and running. How do I fix this?