[Plugin: BackWPup] How can I avoid excluding tables in a multisite blog

I’ve been testing BackWPup in a multisite blog. When I define a database backup job, all tables ara marked to be excluded from the job. Of course, I cant unmark these tables, but this in impractical, because there are hundreds of them.

Is there any way of having all the tables included by default?

Thanks in advance for your attention and this excellent plugin.