> An error dialog pops out "The procedure entry point libintl_sprintf
> could not be located on intl.dll."
Intl.dll is part of GTK. So you not only need to deinstall GIMP, but
also the GTK-version that belongs to your previous GIMP-installation.
GTK commonly installs to Program Files\Common Files\GTK
Hope that helps...
Greetings,
Martijn