Photoshop elements 13

I am rebuilding my computer from a drive crash and trying to re-install my legal CD retail version of Adobe Photoshop Elements 13 but the installer is incorrectly telling me this is not a legal version which is wrong. It has the Adobe seal on the box and was installed on this computer before the crash.  I realize it is no tlonger a supported product but it should still re-install with a legal key unless Adobe blocked it whch is not ethical.  I do not have a need to upgrade as it does what I need it for.