I've just upgraded to 2.08.588. Checked out the Startup feature and all the checkboxes are ticked; the button says Delete Entry and I very nearly deleted them all because the default seems to be to select all entries. IMO the default should be to leave the check boxes unticked.
However, thats not really why I'm writing this post. There does seem to be a bug too. I selected one of the start-up entries and clicked Delete Entry and it did nothing other than send the selected entry to the top of the list.
Anyone else getting this problem?