It seems

addnode=162.243.147.115

is dead because 162.243.147.115 is dead. I just downloaded the software and added it to the config file and got “no block source availaible”

For anyone who still hasn't added the new node, it's much easier to just go into your console in your own wallet and type:

addnode coinminers.net add

You should get no feedback after this command.