First thing first: I scanned quickly through this forum, but couldn't see that this topic had been raised previously. Apologies if I missed it if that's not the case.
I'm about half way through the second season in FM17, having started a new game a while back using one of the face packs on these pages, and I just noticed that all birth dates are wrong by exactly one year (e.g. Jack Wilshere and Wilfred Zaha are listed in-game as born in 1991, but the correct year for both is 1992).
I started in the lower leagues with players mostly unknown to me previously, which is why I missed this error until just now, when I've been able to scout and sign players I'm familiar with. Anyway, I'm loath to start a new game, so I'm wondering whether I can mass edit all birth dates somehow? I don't want to go through and edit every single player (and possibly staff; I haven't checked) using the in-game editor, and I have as of yet not found a solution in the FM Editor (though I'm guessing if I did I might have to start a new game regardless in order to implement the edits?).
Any assistance, help and hints would be greatly appreciated.