Need help with Castle Link installation

Guys, need some help here... installing Castle Link software.
OS = Windows 7.
Previous version 3.254 was uninstalled & remaining directory deleted.
Attempting to install 3.26.0 (current version), Run as Administrator.
Upon completion installation, keep getting "Newer version of Castle Link available".
Program keeps reverting back to 3.254
Have I missed anything?

(this has been happening since version 3.255)