ERROR A copy of Zotero is already open. Only one copy of Zotero can be open at a time.

I cannot seem to get around this. I cannot open the application and cannot find out why. I only have one profile in my Profile folder. I see that i have one profiles.ini fine. I have tried other forum posts but I cant get a solution to work.

Can someone please respond with clear instructions on how to fix this for someone who is not very computer savy. I have a Mac
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