Update GNU-Radio from 3.4.0 to 3.6.2

Hello everyone:

I want to update my gnu-radio version in my computer with ubuntu 11.04.
I thought maybe I should change to ubuntu 12.10 but I read that some
people had troubles running GRC. I’m also not so sure if gnu-radio 3.6.2
is in fact the best version to use right now, maybe you could recommend
a better one.
The thing is that I don’t know if I should uninstall my current version
firts and then install the new one or just install the new version. I
some of you can help me. Thanks!

Carlos Quiroz L.
Valparaíso, Chile.
Electronic Engineer
Universidad Técnica Federico Santa María