I have an old version of thunderbird, 31.8.0, which I had to install because my even older version of Eudora finally died. Version 38 was the last one which had a eudora import function I need to upgrade to version 62 (approx) at least because that is the one that has the outlook add-on Can I just upgrade straight to v62 or do I need to go through this in steps - if in steps, what are they? I have already backed up the profile onto an external drive thanks