Hello ,
I have this problem :
"Thunderbird is already running but is not responding. to open a new window,
you must first close the existing process, or restar your system."
I have deleted the .parentlock file , but the problem persists.
There is no lock file.
Profile.ini file looks good.
Reboot did not help.
Never had this problem . Very frustrating .
Any clue ?
Thanks in advance
Varun