Changes

I also used Eudora for 10+ years before switching to Thunderbird. There is one major problem in Thunderbird: folder navigation. I have many folders and subfolders where I archive messages. This means when I have Inbox open and the message highlighted, I want to put the message somewhere by drag and drop, so I want to go find the target mailbox in the folder navigation pane on the left. But in the folder navigation pane, if I only single-click on any folder, that folder view replaces the main window, that is, I have just lost the message I am trying to move!!! This is really, really annoying. I know that I can use the tiny arrows to open folders and subfolders in an attempt to find the target folder, but it is VERY easy to miss the tiny arrows and click on a folder name by mistake. I really wish the nice folder navigation feature of Eudora, which is also the same as the folder navigation of Windows, were available in Thunderbird!! Or is there any option I can check to change the method of folder navigation in the left pane??? (I know about Eudora-OSE, which DOES work the correct way in terms of folder navigation, but this path is a path of small numbers of users and does not quickly upgrade the underlying Thunderbird, so it is unsustainable.)