The location of nutcoin.conf depends on your operating system:

Windows XP         C:\Documents and Settings\\Application Data\nutcoin\nutcoin.conf
Windows Vista, 7  %appdata%/Roaming/nutcoin/nutcoin.conf                          
Linux                   /home//.nutcoin/nutcoin.conf                                                          
Mac OSX              /Users//Library/Application Support/nutcoin/nutcoin.conf      

if you have not nutcoin.conf, you can make nutcoin.conf

======================================

rpcuser=yourid
rpcpassword=yourpass
rpcallowip=127.0.0.1
rpcport=9507
port=9508
listen=1
daemon=1
server=1

addnode=139.162.22.146:9508
addnode=178.62.70.211:34115
addnode=52.8.65.121:53478
addnode=86.183.67.43:28297
addnode=111.161.32.83:2612
addnode=109.66.115.163:9508
addnode=98.115.147.74:9508

======================================

and 0.8.6.2 is the latest wallet version.