On Mac trying to delete an app Postman Agent but it doesnt look like postman and says can't delete open

I have tried to find an answer for this. I have a postman icon that is blue not orange in my applications and tried to delete the app. It says cannot delete as it is open. Its either faking being postman or running somewhere. Can I use killall in terminal to find and stop this running? Need help please to delete for mac

The blue Postman icon is used for an early build (Canary) version of Postman.

To close an app on Mac, you can go to the Applications folder > Activity monitor > type “postman” in the search bar to see the running apps.