Groups, by which I assume you mean Mailing Lists, are specific to Thunderbird and not recognised as things that file transfer programs are designed to support. Is there a reason why you wouldn't just transfer the whole profile? Account Settings, messages, address books, extensions, themes, customizations all included in one transaction? I think the MoreFunctionsForAddressBook addon will help with exporting and importing address books and possibly Mailing Lists, but you need to understand that a List in Thunderbird has no self-contained existence; it is just a collection of Contacts taken from an address book, so a List is always a subordinate part of its host address book. The bottom line is that if you transfer an address book, its Mailing Lists come with it, free. I think the addon has a tool for exporting and importing Lists, but you may end up with the bare minimum of name and email address; no street address, phone numbers etc. Individual Contacts could also be transferred by making them into vCards and then importing those into the new Thunderbird. I think you'll need that same addon to do this. I don't see any rôle for an Easy Transfer Wizard here. All you need is to be able to do is view hidden files and then copy your files to and from a USB thumbdrive.