I want to unpatch v.1.2.4, so I need to uninstall Kursk, then reinstalling it
In the readme file you read
2. Game deletion
If you choose to remove ‘Theatre of War 2 Kursk 1943’ from your PC, select “Uninstall game” item from the game group in the Start menu and follow the onscreen instructions
There is no uninstall game item in the game group in the Start menu...maybe is it the unlicense Kursk item?