Thunderbird did an update recently to v115.15 and now it refuses to work with CONTINUAL "Not Responding" messages for every keyboard or mouse entry. I spent the last 6 hours trying to flag and delete messages and managed to get about 30 deleted and those were not one at a time. The same thing happened yesterday as well. The "Not responding is so annoying and is all the time now. I need to roll it back to a version that works. The "not responding" started with the last update but this version is totally unusable. The OS is Windows 7.