The file you were given by please.hackmii.com was a zip file. You must have the winzip trial version installed on your computer, and presumably the trial has expired and is telling you that you need to upgrade to the full version to be able to open the zip file. WinZip has no affiliation with wii homebrew, and is also completely unnecessary. My advice is uninstall it and instead install a decent, free archive manager such as [
www.7-zip.org]
But even without installing 7-zip, Windows itself should be able to open and extract the zip file, but WinZip is taking over. Uninstalling it should be enough to get the zip to open. But I'd still advise getting 7-zip for future homebrew downloads which may be in different archive formats (e.g. RAR or 7z).