When Launchbox isn't running, there is a "Temp" folder, "7z.dll", "7z.exe", and 3 txt-files in my ThirdParty/7-Zip folder.
In the attached file, you can see the files that are present when Launchbox is running.
When I want to start a game that needs to be extracted, a game.ini file will be created with the following content:
[Game]
GameId=767c24f8-e2a6-4281-9a5e-6a5a45a0e1de
ArchivePath=F:\Spiele\Redump\Nintendo - GameCube (Europe)\Pikmin 2 (Europe) (En,Fr,De,Es,It).zip
Emulator=Dolphin
Platform=Nintendo GameCube
Title=Pikmin 2
Version=(Europe) (En,Fr,De,Es,It)
SelectedFile=
DecompressedSize=0
KeepInCache=False
EmulatorPlatformM3u=False
MultiDisc=False
I have tried a fresh installation of Launchbox, but I still get the same error message...