I am using 8.5 but it is having issues for me.
WLM 2009 when it comes out, 7.5 if you use XP, 8.1 for vista and above, not sure about anything below XP
I use 8.5 and personally, I’m not receiving any issues.
WLM 2009 and 8.x
4.7.105 if you have 2000 or older