Here is information about how to contact the developers.
Mailing List
The preferred way of communication is the mailing list.
Archives
https://www.freelists.org/archive/concuerror
Subscribe
Send an email to concuerror-request@freelists.org with ‘Subscribe’ in the Subject field
OR
Visit the list’s page at https://www.freelists.org/list/concuerror.
FAQ
You can find FAQ about mailing lists hosted by freelists.org at https://www.freelists.org/wiki/the_faq.