I want to install yt 3.0 instead of the current version.  Is there a straightforward way to do this, or can someone point me to 

a relevant page with the info ?  I have been looking at the documentation, but I don't quite understand how to do it.   I originally used the all in one installation, but all I see in the documentation is the command to get the script for the current stable version.

Thanks,

Paco