Windows 10 1909 I think. I couldn’t find the version of fiddler anywhere but downloaded it two days ago. The setting window opens and I can browse do change the settings. Clicking save is where it just hangs. I was not able to capture https traffic. It also just seems to block the browser hence our trying to turn off the proxy settings. I am doing something different. Since we installed on ms term server and most of the people who need to use fiddler don’t have admin rights and therefore cant install their own copy in app data I copied the one I installed to a separate folder and created a new shortcut to start in that folder. It looks like settings are per user as my installing the cert didn’t take for the other user. This is a very frustrating experience.