It could be the registry keys. If on Windows 7, Go to Start, type in Regedit. Then navigate to:Thanks for the reply, i already uninstall the game but it's look like that somewhere they are still something because the pacher 1,5 remember my activation Code and it's still write : "You are already up-to-date" even if i deleted all files and the folder...
local machine
software
then wow64 if you're on windows 7
norbsoftdev
sowgb
Delete the entire norbsoftdev key. Then run the 1.5 installer again.