To make things even worse I also recently (v. 9.11.0) found Postman process hanging on in my memory after I close it. This behavior isn't bad on its own, the problem is that after few days (of not using the app at all) it ended up eating 10% of my CPU time. Since killing the process manually after using the app isn't the experience I want to have when dealing with simple tool I ended up testing some alternatives.