Can't get it to work. I tried everything..

I am having troubles with Witchersplit. I've setup everything with help of the Guide but it's not working. I start "TW3 Speedrun Launcher.bat" and press 2 + Enter in the CMD to chose Old Patch. After that, i get the Message that "witcher3.exe couldnt be found". When opening speedrun launcher bat with Notepad++ the directory looks right. What am i doing wrong? Please help.

Last time i checked it was only viable to use GameCube/Wii for this run. Has that changed? I would love to run this game but i have no console for this. Thanks in advance.