I have a way old build (Feb 2012) that I use mostly for my Baofeng UV5R and a little bit for a Wouxon...it seems to work fine for what I need to do with it, but has anything significant been added for the UV5R or in general that is a reason to update? What I am afraid of is that I have it working fine now, and somehow every time I try to update just about anything, something gets messed up and it no longer works at all!  I have never updated CHIRP, so I don't know what issues if any I might encounter.  Thanks!