I've just (yesterday) done a new install of Windows 10, and re-installed Thunderbird which has just updated itself to version 128.4.0esr (64-bit) and says it is up to date. Thunderbird handles four accounts for me, three of them Gmail. Each of those three has been set up differently with respect to Bin/Trash (not by me; I just let Thunderbird do all that). One of them has a Bin folder ''and'' a Trash Folder, one of them has just a Bin folder, and one of them has just a Trash folder. What is going on here and how can I fix it so they all have just one, and all called the same (I don't really care which but I'd have a UK preference for Bin!) Screenshot shows two of the accounts; folder proliferation prevents me including the third but take my word for it that the one not shown has a Trash folder!