To update an existing saved report, head over to the Main Card, Reports-view, and click on the saved report you wish to update.

Click on the Save button ('Floppy Disk'-icon).

The following dialogue will appear.

After applying the changes to the report, click on the Update button and you are done.

Notes:
1. The User who initially Saved the report can Update their own reports.
2. If Shared with a User with 'Reporting'-right, they can also Update the report.