L.S. Sorry I'm Dutch 1)The left click and deag folder(s) doesnt work and I already tryed it before you answerd me to select and replace folders. Even looking for a new place is possibly into an other folder and draging it over the Top level is not able; 2)Thunderbird had several times given me known that some actions douldn't be executed although I did my normal treat like saving emails into my folders; 3) In those moments [seen afterwards] (YES) folders automaticly went into others which is my complaint NOW! So they do automaticly do changed positions...;. 4 Then also some folders were empty as I clicked on them, so I lost many saved emails which I needed now and later!; 5) Your addon link you gave me downloaded doesn't work as I assumpt ,

So there's a tremendous/huge problem a) that Thunderbird had and  b) made there own problem for me... c) loss of saved mails is terrible fot my use.  Perhaps Thunderbird needs a comprehensive re-programming?   HELP?