ok cool...
the wallet.dat is the file. (if your sure) u can delete that.
then start the wallet.
then you can import your coin into it.
dont put the pw on it yet.
thats the part that screws you up.
(or you can get the coinomi wallet, for android/etc)
or another type of wallet. coinomi uses a seed words...
etc.
just dont move fast. thats the thing.
g