Re download Aseprite to get 1.3?

Hi! I need to get Aseprite 1.3, so I clicked the button in Aseprite home that says 'New Aseprite available, and it sends me here. I then searched for how to update Aseprite on the internet, which brought me to a page, telling connect to Steam, to resend the Steam key. Then, Steam asked me to re-download Aseprite, and that would mean losing all my work. Also, the ‘support’ link for talking with an admin doesn’t work. Thank you in advance!