Where is Tampermonkey's "Storage" tab to edit the storage content?

According to the FAQ of Tampermonkey:

Q400: I want to edit/view the values stored by a userscript. How can I do that?

A400: Open Tampermonkey's Dashboard and click at the script's name. Click at the 'Storage' if present and check or modify the stored data as needed. If there is no 'Storage' tab, then the script has no data stored.

I can't find the Storage tab, can anyone confirm me it works? Screenshot of where is the tab? (pretty sure my script has data stored in it because when I use GM_getValue I get something).

Here is a screenshot of my script without the Storage tab. After running it, the value is stored according to my console.log, but still no tab.

Requirements for the Storage tab to appear:

1. The script has must have actually saved a datum using GM_setValue().
2. The Config mode must be set to Advanced:

After that,

To see it:

1. Open Tampermonkey's editor on/for the script in question.
2. Click the Storage tab.
3. Data there is in JSON format. If you edit it, recommend checking with a JSON validator before hitting the Save button.

Here's the sequence in screenshots (Click for a larger image):