Subscribe by Email - bulk delete email in line

Hi there.

Been using this plugin for a while, but somehow a spammer post very nasty post on my blog and now his post is in the email log, waiting to go out. I managed to stop it by de-activating the plugin - most of the emails still appear in the log to go out.

For some reason I can only delete 20 emails at a time in the log - when I'm trying to increase the number, it revert back to 20, will take me days to delete all the mail.

Cannot find the table with the content.

Any idea where I can find this?