You can add or remove filters from your dropdown menu as you need.
1. Click on the thumbtack filter icon and select Manage Filters:
2. The popup below will appear. Click "+New".
3. Navigate to the filter you want. You can either use the page list dropdown to find it, or search for it using the text field (i.e. the box with the word 'translator' currently in it)
4. Once you have selected the filter you want, click "OK". It will bring you back to this popup. The new filter you selected will be at the very bottom of your list. If you want to move it further up the list, you can click on it to highlight it, then click the "Up" and "Down" buttons on the side until it is located where you want. When you are satisfed, click Save.
5. You will now have this filter in this in your dropdown, ready to use.