The crash only happens, if the closed project has "remote_debugging" entries in the cbp-file.
This can of course happen, if you want to do remote-debugging, or if you are curious (like me) and click on the build-target in the debugger tab of the projects "Properties ..." window.
Even if you don't change anything, but click "OK" to close the window, and answer "Yes" to the "do you want to save changed project-settings"-question when closing the project, the "remote_debugging" entries appear in the cbp-file.
Nevertheless it's a bug and should be fixed.