I doubt if updating will fix it. Since you don't know how to change it, it's probably still on default currently.
I run HDS units, but there is a flash of the Hook menu in that video that suggests how to change it. If you hit the Menu button *once* you should get the menu in the photo attached below. Scroll down to the
Overlay Data button and then to the right. That should put you into the menu to edit your overlays. From there you can select what information displays in each spot, what size the font is, etc. You may have to hit a
Configure button before it will let you adjust the size of the text. HTH.