Can not log onto wallet

Hello,
I had a wallet on my laptop and when I load it now asks for a local wallet? Before it only asked me for a password. I dont know where to look for a local wallet? I think I found a file that worked ending in .json and it loaded a wallet called Mijin. I don’t know what that means. So I can’t get to my xem tokens. I don’t know why this is so difficult. Can anyone help me?

Duplicate Can not login to NEM wallet on Windows 10