Well, I'm not going to repeat what everyone else has said about the language, but hey, chill. No need for the explosion.
The update shouldn't have affected your account, as it only alters the game files that you have on your computer, not the information regarding your account.
Say you downloaded FeralHeart on another computer, but logged in with your own account, all of your characters and info would still be there, despite the brand new files.
I doubt what has happened is because of the game update, but possibly has something to do with the forum update. It was mentioned by numerous mods that there would be a few glitches and hiccups here and there since this is a brand new update with the site.
It is unfortunate with what happened, but remember to keep reasonable. I really do feel bad for you. I get what it means to be attached to characters and all that you have been through with them. I would be devastated as well if I lost everything, so I understand.