I did some cleaning up of my Documents directory, including deleting the joulescope folder which causes a error on start up with no option to resolve:

Maybe pop up a dialogue that allows the user to specify a new folder (or recreate the folder automatically) rather than bailing out.
Hi @haly-tom. Thanks for the info, and I am able to duplicate what you see. We are working on a major update to preferences that affects this behavior. I just tested and found a different incorrect behavior in the software - it did not crash, but did not create the directory either. The next release will create the directory automatically if it does not exist.
Thanks!
The 0.7.0 software fixes this issue, and it also makes the paths more platform-friendly, particularly for macOS.