The first method: The "Vocal Remover" tool:
This is simple and relatively fast. You need to go to "Effects" and once there, all the way down to "Vocal Remover". Depending on your version, you might need to look for it under "Effects/Plugins/"
Once there, you run it, making sure you chose "remove vocals" from the drop down menu of the plugin. And that's it!
Vocal Remover will work well with some songs. An important observation is that you need an unsplit stereo track for this method to work. What is an unsplit stereo track? What can you do if you tried Vocal Remover and you didn't like the result? Please read the second method to find out the answers.
The second method: Using "inversion" for one channel:
This is more difficult. Stereo tracks have the audio in two different channels (left and right), and such channels are merged (unsplit) in most songs. The second method consists of splitting both tracks and then applying the tool "inversion" to one of them. Once done that, both tracks must be set to "mono" to be exported.
That sounds a bit confusing, especially if we do not know much about sound edition. Fortunately, several people have posted video tutorials. This is one by Jimmy Ruska:
There you go! The second method has worked better in my case, but it's a matter of testing to see what works best for you.