Ok, I missed the ITunes thing, since the other user described connecting to a folder and you said you had the same problem
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I am not at all surprised the Android thing doesn't work, since that didn't exist when the plugin was created.
I know there was some iTunes related changes a little while ago to calibre, perhaps that changed something breaking this plugin? Is iTunes connectivity working for anyone else - I don't use it myself. I will take a look at some point...