Hello John! It sounds like you are experiencing issues opening JPG files attached to Thunderbird emails. The behavior you described with Live Photo Viewer opening and closing immediately can be frustrating. Here are some steps you can take to troubleshoot and potentially resolve this issue: 1. Check Default Programs Settings: - Ensure that the default program for opening JPG files is set correctly. Even though you mentioned that all file associations are correct, it's worth double-checking this setting. 2. File Association Verification: - While file associations may seem correct, sometimes they can get misconfigured. You can try resetting file associations to default and then setting them again. 3. Security Software...