Dear FreeSurfer Developers,

We have been trying out, for the past few months, the freesurfer dev releases, and in particular this one:

freesurfer-X86_64-unknown-linux-gnu-dev5-20150924

My question is, does the above version classify as a nightly version of FreeSurfer 5, or as an early beta of the 6?

Or......do the dev versions fall in some kind of grey area that are neither 5 or 6?

Thank you in advance,

Elia.