Currently there is not a way to disable the Escape key. It's intended to be a reliable way out of a session in case you need to end it early or forget what the valid responses are at a given time. If the Esc key is pressed, then all of the data up to that point are still saved to the data file. So, yes, you could start again where the session left off but it would be a bit of a pain. You would need to look at the data file to see what trial they got to and then enter the remaining range when re-starting the session. For example, if the subject reached trial 50, then you could enter "51-200" in the range field when re-starting the session. The pain is that you would need to rename or move the data from the initial trials so that they would not be overwritten. You would also be able to do this only in cases where independent trial randomization would not be an issue.

As I'm writing this, it seems a simple solution would be to add a "use protected escape" option. If selected then you would need to also press the control and shift keys at the same time or it would not work. I'll add that to the to-do list for the next version.

As for the Windows app key, that typically does not end the session. In some cases though, it may minimize the session window. If that happens, you can usually alt+tab back to it to resume where you left off.