i'm looking for a trainer which gives me god mode. but i don't know which version i do have to download.
is this 1.4.5.xxx or 1.5.0.xxx? why does gog have such weird version numbers? can't they just keep the original ones?

1.5.0.1304 GOG's numbers you are referring to is the installation package number. They do show the game version.
Put your mouse over the witcher.exe in your ..........\The Witcher Enhanced Edition Director's Cut\System directory
& it will show you the game version.