Just installed LXLE 14.04.3. Uninstalled Seamonkey -- hate it -- replaced it with Thunderbird and Chromium.
Everything seems to be working okay, except for Thunderbird. Each time I try to start it, it tells me Tbird is already running and I need to terminate the process or reboot. Task manager does not show Tbird running. I reboot, I try to start Tbird again, same message.