I often have multiple non-associated projects open in multiple IDE's, When I try to close one of the projects and the associated IDE editor the project closes but the IDE remains running.
I open additional projects from the recently opened as either open in new or open in existing, When I close that project either from the file menu as close project or by closing the IDE with the window close, the other projects, correctly, remain running. The one I am closing will close the project but not the window, when I then try to close the empty IDE PHPstorm shuts down, there have been occasions when I have had 4 or 5 IDE's running after closing the extra projects I end up with 2 or 3 empty IDE's running, the only way to clean PHPStorm up is to close the application and reload it again. IN the previous versions this was not happening, ide's were opening and closing correctly.
This is running Windows 10, with the latest version of
Build #PS-171.4249.3, built on April 12, 2017
JRE: 1.8.0_112-release-736-b16 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0