Excel Mac - Power Query Editor not showing up

A few days ago I managed to get the Power Query Editor by activating the Beta channel.

Suddenly today, the "Check for Updates" option is gone, and the Power Query Editor option is missing from the drop down.

I did some work using the editor, and really need it back to continue my work. Any ideas why the editor is missing?

Even if I go back to the "Current Channel", the editor still won't show up.