Is this miner located with you (ie on your home network).   If so should be pretty simple.  It is hit/miss on this but if you open http://myminer.io/ it sometimes show's the SP gear on your network and current ip.   If not you can go to your router and look at connected devices and find IP there for the miner.

You will need to sign up to another pool.   Enter pool information on configuration page.  Look at status after to make sure it's working.