[*]Search for entry
To delete all "Never Remember" sites skip to next step
Code:
SELECT * FROM moz_disabledHosts WHERE hostname LIKE '%URL%';
Where URL is part of the website for which you hit "Never Remember".
If you don't have many "Never" sites you could just try:
Code:
SELECT * FROM moz_disabledHosts;
[*]Delete entry
Once you have managed to limit your search results to only the URL you want (or all of them if you want to delete all "Never" sites) replace "SELECT *" with "DELETE":
e.g.
Code:
DELETE FROM moz_disabledHosts WHERE hostname LIKE '%URL%';