hi, was using myzerowallet (MZW)

just the coolest!! made a couple paper wallets and sent 0.0004 between MZW and ZeroSimpleWallet -- learned alot in a short time.
i like the phrase method for passwords, and perhaps because most users don't "extra password protect" in MEW, myzerowallet shouldn't worry about it. i think that's what the recent conversation regards...
was very easy and just enought feedback from ZeroSimpleWallet when importing single private key. i've never had an easier time getting ZER moved around quickly, love the roadmap too.
still working toward recovering 200 Zero in the previous wallet. looks like wallet.zero (new name) isn't backward compatible with wallet.dat -- i'm sure that's way toO simple but there it is, great job!
As far as I know the wallet file has always been named wallet.zero. Have you tried just changing the extension on you file? Obviously make a backup of it first.
Or maybe it's a wallet from a different coin with a similar name....