After both updates to Thunderbird and Windows 10 Thunderbird crashes immediately upon launching. I do mean I cant get past trying to launch it!. I get a Windows 10 blue screen with the message "IRQL not less or equal". I have to shut down and restart the computer each time. I figured out how to get into safe mode and Thunderbird works just fine there. Really like Thunderbird and have used for years and have never had this happen. I have no other problems with anything else except this issue as a result of the Windows and Thunderbird updates. I don't which of the two is causing the crash? I disable all the add ons while in safe mode and made them permanent but this had no effect. I was going to uninstall and reinstall but I don't with if this will destroy all my many important folders which are very important to me.