So I migrated Thunderbird to a new computer of a freind exactly as described in the articel [[https://support.mozilla.org/en-US/kb/moving-thunderbird-data-to-a-new-computer]] and it seemed to work. Closed the program and went back to it and... Nothing anymore! TB opens, but is completly blank! Almost any Menu is visible, those who are, can not be clicked and so on... So I checked Versions. They are the same on each computer! Tried the 32bit and the 64bit on the new one, still nothing... Each time I enter into the roaming data, delete the TB folder and repaste the "Original" one, it opens again one (1) time where everything works, but after that it goes blank again... Sorry I could not find a similar post, so I dared to open a new one! Any help would gladly be apreciated! Thanks in advance from Luxembourg...