This usually means Excel blocked the file because it was downloaded from the internet. Ensure you have unblocked it in file properties and that your Macro Security is set to "Disable all macros with notification".
If you tried the executable version of Straxx "Free Fixed" and it failed, here is why:
Ever forgotten the password to an Excel sheet and found yourself locked out of your own data? The Straxx Excel Password Remover
This does not work for "Password to Open" files.
Getting locked out of your own data is a common headache, whether it’s an old budget file or a shared sheet from a former colleague. While Excel's protection features are great for security, they become a major roadblock when you forget the password.