Thanks for checking integrity of wallet. After reading your post, it looks like one of these operations that you shouldn't do at home if you don't know what you're doing. Well, this thing is definitely not for my skills. Maybe it would be possible to do it following your instructions, but I doubt that my wallet would work after that.
It's good to read that wallet is genuine. I was a bit sceptical about theory that Betnomi may have done something to it, it sounds like a bit too much sophisticated plan. But when it comes to scammers, you never can be sure.