I've been using Cura 3.1.0 on a macbook (OS 10.11.6) for years, and last night I altered a file I wanted to print successfully, but when I tried to save it, I got the message "ERROR Permission denied when trying to save / (filename)". I also tried an old file that worked in the past, same result. What's going on?
I also tried to install 4.4.0, but I'm getting crashes.