Need help with Castle Link installation

It runs. Administrator or not, remove folder or not... No problems.

But the problem is .. program keeps reverting back to version 3.254 automatically by itself.

Any ideas why this happen ?

The icon on desktop says it's 3.26.0, but in the About window, it says 3.254.
I tried to reinstall with Repair and Modify option, but still same situation.
I tried to uninstall and install again, still the same happens.