Hi,
use "Extract and replace links" feature:
http://manager.themasoftware.com/faq.php?expand=faq303There is an option at the top "Remove all links" and also option to search in "All websites".
* Since you delete the host from the program as I understood -> add the host back in "HOSTS" tab, disable other hosts which you have there, leave only send.cm enabled (then only that host will be extracted from posts to remove). All other hosts should be red (disabled) so that won't be extracted, enable them later after done.
* In "POSTS" -> select any site -> select posts -> press "Extract links" button -> send.cm links will be extracted, at the top choose to search in all websites and enable "Remove all links" -> press "Replace links" button.
All links will be removed (from all websites if you chose to search in all websites).