I am not sure here is right place to announce, but I think this is valuable to announce publicly.
Sometimes I fall into a situation that MCUXpresso IDE always stucked and "Not Responding" is displayed no matter how many times I try to launch it.
I can do nothing but kill the process.
I found that deleting "workspace\.metadata\.plugins\org.eclipse.e4.workbench\workbench.xmi" solves the problem though it will reset workbench.
I think this is a bug of Eclipse??