update lyx 2.2

[Wolfgang Engelmann]

I have updated my lyx from 2.1 to 2.2 by using muon of Kubuntu
How do I get my system to use the new 2.2 instead of the 2.1 which is 
under texlive?
I would prefer to call it up with lyx2, so that I can still call up the 
old texlive lyx with lyx.
Wolfgang