Scheduler
Some screenshots or videos may show an outdated interface. There are no critical changes that affect understanding of the main functions.
The Scheduler lets you configure the start/stop of any task after a certain time or on a schedule.
To set Scheduler settings, open the task launch settings ("Creating/Editing a task") and click the "Scheduler" button at the bottom of the window.

Scheduler settings form

Active — the checkbox must be enabled for the scheduler to fire for this task.
Modes: One-time — Start and/or Stop the task at the specified time. Schedule — Run regularly at the times in the schedule. You can limit the run period via the specified schedule by setting Work dates. For example, if the schedule runs the task every Thursday at 10:00 and Work dates are set from 03.08.2021 to 06.08.2021, the task will run once on 05.08.2021 (Thu) and won't run again after 06.08.2021.
Scheduled tasks list in the Scheduler
In the top menu you can open the list of all scheduled tasks in the scheduler. It shows only currently relevant scheduled tasks (the stop date is empty or earlier than the current one).
Pick the desired scheduled task in the table and right-click to open the menu.

You can change the settings of a scheduled task (mode, start/stop time) anytime — both from the task launch form and from the table in the scheduler; the next-run time will refresh after saving.
When the program is started/restarted, the scheduler will schedule task starts/stops as configured. Don't forget to disable the scheduler for a task if you don't want it to start/stop automatically.