Open the address book window and select Tools-Import Make sure you move the data to the correct places to import correctly. There is a screen to let you do this once you get into the import process.

I have done everything I can think of. I have imported CSV files in the past, but now that i've upgraded Thunderbird, there is no option to import CSV files. It says

        Import Everything

or select the type of material to import:

Address Books Mail Feed Subscriptions Settings Filters

I have tried all of them and nothing allows me to import anything but Outlook Express when I choose everything. The others give me some options, but I can only import outlook CSV files. I don't have Outlook on my computer, nor do I have Eurdora nor Windows live mail, which comes up under settings. Feeds will not accept CSV files. Nothing seems to take these files any more. I put them in Openoffice spreadsheet and tried to move them from there, but that didn't work either.

The import menu under tools in the address book is the same as the import in the main page.