After you buy and install any Expression program, you should immediately license your software to avoid future interruption of the programs. If you don’t license them, the programs will stop running after 60 days or possibly sooner if you have used a trial product key. When you start any unlicensed Expression program, a dialog box may prompt you to enter your product key to license the program. If you’ve closed that dialog without licensing your software or the dialog doesn’t appear, use the following steps to license your software instead:
· To license Expression Blend, Expression Design, or Expression Media, start the program, choose Help > Enter Product Key, and then enter your product key which appears on a sticker on your software box; if you bought Expression Studio, licensing just one of these programs will also license the other two.Read more ...