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SignalPro will try to update a session 5 minutes before its expiration. Then, once the session expires, they have 5 additional minutes (grace period) to save their work. So, in the worst case scenario where internet access is lost moments before SignalPro would have updated the session, the user will still have 10 full minutes to finish saving before the software shuts down.
If a study is running when the license expires, the study will continue to run in the background until completion. However, if the user clicks Ok on the warning dialog, the 5 minute shutdown timer begins, and the study will be cancelled when SignalPro closes.