I am in the middle of finals and I love to use graffle for flowcharting. Today, I opened it for the first time since last semester and it asked if I wanted to download a new version, I thought sure (thinking it was an update only). Now I've realized that I need to buy a license for that version that I don't really need because the old one did everything I needed it to. How can I revert back to my old version?!? Please help!