addnode=195.68.128.122:48886
addnode=89.223.28.29:48886
addnode=212.192.89.210:48886
addnode=195.123.211.235:48886
addnode=139.59.255.168:48886
addnode=89.175.21.59:48886
addnode=185.158.114.199:48886
addnode=24.149.35.181:48886
Help -> Debug Window -> Console
addnode 195.68.128.122:48886 add is the form of the command
For the missing generate receiving address button (should be a green + mark), I have no clue.
Update: For new receiving address, you can use the console.
Help -> Debug Window -> Console
getnewaddress