How do you change club addresses back to defaul? Our alias don't work

We have a custom URL that forwards to our FTH account When that was done, the person who made the change also changed the club addresses to use the alias, but they aren't forwarding. WE would like to go back to the original @toastmastersclubs.org addresses but I can't locate where/how to do that. TIA
 

1) please always include your club number.

2) the documentation contains that information
support.toastmastersclubs.org/doc/item/basic-settings

Thanks for your response, I realized I need to completely rephrase my question so I will make a new topic with that question.