Left click the three lines at the top of Twitch Launcher.
Hover over File.
Left click Settings.
Click the Minecraft Tab.
Scroll down to Launcher and the Launcher Method.
Left click Jar Launcher.
Hopefully this helps you out.
Got it to work. I needed the Jar launcher.
It pretty much creates a file, puts it in that folder and then tries to go to that file and errors out in the process.
I get this error:
Unable to save downloadName: gravel1.oggURL: https://resources.download.minecraft.net/e8/e8b89f316f3e9989a87f6e6ff12db9abe0f8b09fError details: The process cannot access the file because it is being used by another process.
Attempting to move successful download.Filename on disk: 6e73-4e1a-c7cc-86e7Path: C:\Users\basse\AppData\Local\Temp\6e73-4e1a-c7cc-86e7Exists: File
Can anyone help me out of this situation?