Hello,
you must to choose between production releases or unstable(releases candidates).
Just register on EFW Comunity, and then run:
# rpm -ivh h**p://updates.endian.org/upgrade.rpm
# efw-upgrade
you must fix the address for http
here EFW is gonna ask you for a username, which will be the data you register on EFW(for free)
then, it will ask you for 2 enviroments, production or development:
1) Production (stable releases)
2) Development (bleeding edge)
choose your option and then press enter, efw will upgrade all available packages.
bye!