In the ACP, if you do not provide a correct URL, it breaks the extension and there are errors on the ACP. Not good.
So really what is needed is codE to handle the error gracefully and just give display some text "File not found!"
Otherwise, I have to deactivate the extension, Delete Date and then re-enable it and try again.
For me, the user parts work and I even see the widgets for forum "Latest Posts" in Wordpress. Very nice!
Avatar is broken but you had already mentioned that. It would be nice to see it working in the future.