Hi,
not sure what happened, but I was using this regexp until yesterday:

^\\[Better Chat\\]\\s(?<sender>.*?):\\s(?<message>.*)

and it was working ok. Now it doesnt work anymore. Any idea why? Is there a new string?

Same here, Better Chat messages after update no longer match to pattern [Better Chat] :/

Update of Oxide/umod fixed it, the regexp which works for me is :

^\[Better Chat\]\s(?.*?):\s(?.*)

If that is entered in the required field it tells you that it is an invalid preset and to replace it before saving

Looks like the forums here removed a part of it, trying now with source code formatting:
^\[Better Chat\]\s(?<sender>.*?):\s(?<message>.*)