So I have installed TeXlive 2013 following the steps here I was previously using my custom theme called
beamerthemeEinstein.sty that I placed at
/usr/share/texmf/tex/latex/beamer/base/themes/theme then I run
sudo texhash and it worked amazingly.
Now with TeXlive 2013 my custom theme is not recognized, I get
! LaTeX Error: File `beamerthemeEinstein.sty' not found.
Where should I place it now? Anyone knows where to place custom themes using the 2013 version? Many thanks!