how to change home url link and title?

So, Breadcrumb NavXT uses the get_home_url() function for generating the link to the home page. If you want this to link to something else, you should probably get that function to return the URL you want. Another, Breadcrumb NavXT specific, option is to use the bcn_breadcrumb_url filter to modify the URL for the home breadcrumb. This all said, for most circumstances, I would recommend against having your home page for a site not be the root page for said URL (e.g. the home page should be domainname/ not domainname/home, where domainname is your site’s domain name).