I finally started learning about this thing and all the videos I've seen so far show four traces. I've only got two. Do I need a firmware update, or what?

yes there are many versions avalible versions I will do some research I
need to update mine as well as I only have 2 traces also.

Hi Bear,
Download and read one or more of the several user guides available in the files area of the forum  
Since this is your first time,  read the absolute beginner's guide. Also, since you have a Gekko, it probably has really old firmware so read up on how to update your device. 
Lastly,  please browse the forum wiki  

On Wed., 27 Jan. 2021 at 7:08 p.m., Bear Albrecht
<W5VZB.NM@...> wrote: I finally started learning about this thing and all the videos I've seen so far show four traces.  I've only got two.  Do I need a firmware update, or what?

Use menu to go to DISPLAY then TRACES then select the other two which are
off.