What do I do with it?

After installing and/or running the exe, you first click "File", then "Seed". You then have to either enter 1000 digits manually or click "Random". Once you're done, click "Save". Wait until you want to sign up for an account on a website or want to change the password of an existing one. To use Pass the Pie, think of a one password to use for everything and type that in the password box. Then type in the name of site you are visiting and click "Generate". Where you would usually type your new password for the site, click "Copy" in Pass the Pie and right click on the website's password box and then click paste and finish as usual. When you need to log in to that website, repeat the steps for Pass the Pie from entering the password you thought of, to clicking "Copy". Now paste the key into the password box of the website similar to before and click login.