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We've completely re-designed Overlook and will be releasing a completely new version this week.

However - we have no enabled this feature exactly. Now, tester will have to duplicate a test plan to execute it every day.

This way, you'll have a list of test plans like this: "test plan - day 1", "test plan - day 2" with results for each.

If you have other ideas, we're happy to explore them.
We've completely re-designed Overlook and will be releasing a completely new version this week.