Katie,
I had gotten a backup file of my Tumblr in XML previously but can no longer say how. I looked all over last night trying to find how I had done it (from the Tumblr site) but cannot.
Using that XML backup I used the WordPress importer under Import in my dashboard and it worked beautifully.
Hopefully the above solution works for you. If it is that simple it seems either the plugin or the API site could mention it though.
Mark
Fixed it on my own, without the plugin.
Thanks.
That did it! Thanks so much for the quick reply.
Thank you! Having a good read now.