First, I'm told that I don't have an account when I do have one -- I, of course, can't find it either nor can I find the topics that once were so easy to find. Keyword search for kinship calculator turned up references to Native American languages -- not helpful. The other site was easy to use and provided the information desired -- why "fix" it?
Topic on Help talk:Extension:AdvancedSearch
You're in the wrong wiki, it is more sensible to report that to familysearch wiki (apparently admins here overzealously removed the helpful summary added to direct you there).