It will have lost some potency, and some guys are totally against it, and I won't argue the point, but I'd still use if you have enough to do anything with. I have some of a qv enanthate jug slightly older than yours and not trashing it yet... Also I'm just about to finish a jug of homebrew tren (75ml EOD) that's been around that long, and it definately still worked. On EF one of the mods is still using some QV from that period and just noticed this year that the bold (I think that's what it was...) didn't have the kick of last year but was still good.
Never used their tren though, just my own brew, but have used the QV Enanthate 250 and Bold.