[wp-postratings]: Error deleting Setting Key ‘widget_ratings_most_rated’.

When uninstalling, I get the following error. Background: The “Highest-rated” widget showed the highest rated posts allright, but all links were directed to the same post, which had no rating at all. So I tried uninstalling and reinstalling, had the error and could not make the plugin work again.

Please help!

Table ‘pb_ratings’ has been deleted.

Setting Key ‘postratings_image’ has been deleted.
Setting Key ‘postratings_max’ has been deleted.
Setting Key ‘postratings_template_vote’ has been deleted.
Setting Key ‘postratings_template_text’ has been deleted.
Setting Key ‘postratings_template_none’ has been deleted.
Setting Key ‘postratings_logging_method’ has been deleted.
Setting Key ‘postratings_allowtorate’ has been deleted.
Setting Key ‘postratings_ratingstext’ has been deleted.
Setting Key ‘postratings_template_highestrated’ has been deleted.
Setting Key ‘postratings_ajax_style’ has been deleted.
Setting Key ‘widget_ratings_highest_rated’ has been deleted.
Error deleting Setting Key ‘widget_ratings_most_rated’.
Setting Key ‘postratings_customrating’ has been deleted.
Setting Key ‘postratings_ratingsvalue’ has been deleted.
Setting Key ‘postratings_template_permission’ has been deleted.
Setting Key ‘postratings_template_mostrated’ has been deleted.

Post Meta Key ‘ratings_users’ has been deleted.
Post Meta Key ‘ratings_score’ has been deleted.
Post Meta Key ‘ratings_average’ has been deleted.