yes but thy are on the same drive (the Source SDK-multitool and the Source SDK)

I unziped the file with the fgd folder. I don't have an application in it with the name "SDK Launcher.exe" I only have "Source Multi-Tool" , "Read Me.txt" and the fgd folder.
When I start it there is no window from the tool. There is only a process which disappears after a short time.