Shutting down IAM leaves a hanging process and it has to be shutdown manually.
DevTest 10.3.0 and 10.4.0
This is a known issue and will be fixed in DevTest 10.5.0.
The only workaround for now is to kill the orphaned process from Task Manager manually. There will be an extra Image Name of java.exe, so stop this process.
On UNIX and MAC refer to: