the beatmap that i downloaded is in a zipped-folder and it won't work. it says 'If this is happening to you, don't left-click the download button; right-click it and select "Save As..." but when i right-click , there's no 'save as..'
Download it as usual. If the .osz file is downloaded in .zip format, DON'T EXTRACT IT USING WINZIP. Just place it in Osu! songs folder and Osu! will extract it for you automatically.
Also, look for "save link as" after right clicking or something.
Hope that helps, and read the FAQ if you didn't yet.