ESET extension for Thunderbird doesn't work for long time since v4 of EAV. I cannot uninstal it from TB. It is grayed and says that it is not compatible with Thunderbird 3.1.4. I have the last version EAV 126.96.36.199. Tried repair installation, re-installation with no results. First time this extension was working for some old version of EAV (I don't remember exactly). After update to next version it stopped work and doesn't work now for maybe two years up to now. Is there some solution for me? Thanks. Windows XP SP2. Update. I fixed it. I found in Registry two folders with Thunderbird extension. Made backup registry (with ERUNT) and deleted folder Thunderbird and its subfolder Extensions from [HKEY_LOCAL_MACHINE\Software\Mozilla\Thunderbird\Extensions] "eplgTb@eset.com"="D:\\Program Files\\ESET\\ESET NOD32 Antivirus\\Mozilla Thunderbird". Restarted computer and got working ESET extension for Thunderbird. That is it. Regards.