I want to update to 2.8, and it looks like I just have to download that version. Will i have to delete my old version or will it automatically replace it?
Windows 7 here, and I use a desktop shortcut; You can download it, unzip to inside your "Blender Foundation" folder in Program Files, it shouldn't delete the other versions. You will have to make a new shortcut on the desktop for the new version. Then you can delete the Zip file, or keep it.