In order to remove or delete jobs to prevent them from running, from the HOME tab, here's what to do:
See this related article - How to remove one or more Notifications (people) from an individual Job:
1. Click to select a Job or multiple Jobs that you wish to delete.
HOW TO SELCECT MULTIPLE ITEMS / JOBS
Windows: Hold the Ctrl key and click to select items (jobs) not listed together. Or, hold the Shift key and click the top and bottom items to select the entire list.
Mac: Hold the Option key and click to select items (jobs) not listed together. Or, hold the Shift key and click the top and bottom items listed together to select the entire list of items.
2. Click the REMOVE button.
3. Review the pop-up information, and if everything looks correct, click "CONFIRM"
If you selected multiple items (jobs), you will see this type of pop up.
If you selected an individual item (job), you will set this type of pop up with the name of the selected item.