So I had to wipe my parents computer running High Sierra and do a clean install of Mojave (there is a Time Machine backup but for now let's call that point moot and iCloud didn't back up the passwords ...

Is it possible to change of bunch of keychain utility passwords at once? I have Keychain Utility storing the logins for many services across many sites: BBedit ftp, Fetch ftp, sftp, database client ...