I do not know why I had such a duh moment, but is there a method to back up installations to reinstall? Should I rerun the install.php?
You can't do this with an installed dokuwiki.
As for the 403: Is the operating system on both computers the same? 'apache' works for Centos and Red Hat but not for Ubuntu or Debian, where it is 'www-data', and Mac '_www'. And there are others.