Hi @PFKlammer! Thank you for backing Joulescope and welcome to the forum. Also thank you for posting the log file. The log file tells me that the software could not find a Joulescope connected to your machine. Are you running Windows 7? If so, you may need to convince Windows 7 to recognize Joulescope correct. See this post for instructions.
If that does not work or you are on Windows 10, could you look in Device Manager and post what you see? Could you also look at the Joulescope and verify that the USB “status” LED is illuminated?