Installing HotFix 4.12 fails

I have downloaded and installed hotfix 4.12 but when I try to start the program it still says that I need to install the HotFix.

When I try to install the HotFix it says it is already installed, so that leads me to thinking, have installed the wrong HotFix?

If so, where do I find the correct HotFix?

Best regards
Kasper Katzmann