During the executing the a store procedure debug, I need to cancel, I stop debug with break shift+esc then the plsql/developer is frozen until I kill the windows process
I am also facing almost the same as described here.
1) I start on debug mode.
2) I encounter an exception
3) PL/SQL developer is not frozen but no action could be performed.
4) I have to kill the process and re-open again.