ESCAPE key not exiting experiment in Superlab 4.5.3?

Is there a new key assigned for exiting experiments? Upgraded today to 4.5.3 from 4.5.1 and the ESC key is not exiting the experiment.

Other keys are responsive during the study. Is there a setting that I might have changed by accident?

Nothing in regards to using the esc key has changed within SuperLab. However, sometimes settings on an audio or movie event can interfere. As long as no audio event or movie event is active, you should always be able to exit with the esc key.

You may need to check the keyboard layout settings and/or language settings at the operating system level.