Hi all, this morning I was called to the PC of my friend running TB 52.3. He complained that Lightning stopped working. I checked his installation and Lightning was installed from AMO, since the Add-ons manager offered "Remove" which it wouldn't do for distribution add-ons. Correct or wrong conclusion? (*) So I removed it and was looking for ways to re-activate the packaged add-on. I went so far as to deinstall and reinstall TB, but the distribution add-on didn't come back. I even deleted extensions.ini and extensions.json from the profile and was prompted to allow installation of all the other add-ons and dictionaries, but not for Lightning. So can a distribution add-on be reactivated and why does it go missing? (*) In the end I installed it from AMO but found tht AMO hadn't been updated since April 2017 and that there were people saying that the AMO version doesn't work with TB 52.2.1. I installed the April AMO version anyway and luckily everything was working after that. Should that be updated more regularly? (*) I marked my questions with (*). Answers appreciated. Jörg.