ok, i understand. you need photoshop cc.
before you install it, do you also want photoshop cc 2014?
if not, uninstall (using the adobe uninstaller) it before installing photoshop cc.
if yes, you want both photoshop cc 2014 and photoshop cc, don't uninstall photoshop cc 2014. we can fix which application opens your files after photoshop cc is installed.
now, if you are unable to install photoshop cc via your cc desktop application because it shows that photoshop cc is up to date (even though it's not installed), use this link: CC desktop lists applications as "Up to Date" when not installed
if you have some other problem installing photoshop cc, what is it?