Follow steps with respect to Screenshots attached:

1) Click on "Forum" tab

2) Drop down menu will appear
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more...

3) Scroll down and click on "Monitor" from drop down menu

4) In monitor forum click on "Select Monitor Group"

5) I have selected "TL Monitor" just for reference. But you should select "Forum Monitor"

⏺️After that click on 3 parallel lines at the right end of the screen (marked in blue colour)

6) A list will appear, scroll down and click on "Quit the FM Monitor Group". After this you will out of FM monitor group