AutoBlog relaunch

Hi there
I tested the AutoBlog plugin with different sites and parameters
I deleted all the imported posts of one site to 'autoblog' thm again with new parameters (I added the link to the original post) and I have a problem : the plugin tell me "I know the first post and I stopped the process". I tried to delete the feed, but I obtained the same running.
How can I run again this feed ?

Thanks