That configuration file was already included, but I went through the steps anyway. I also uninstalled and started over again; however, I am not getting any connections. Maybe this coin is a dead coin?
I had significant trouble when I first installed as well. Add all of these nodes to your archoin.conf file. It fixed it for me.
addnode=supernode.archcoin.co
addnode=104.131.74.40
addnode=108.20.214.165
addnode=108.21.112.195
addnode=110.20.142.231
addnode=114.79.28.212
addnode=114.79.47.2
addnode=121.73.217.8
addnode=138.91.136.18
addnode=162.245.22.23
addnode=173.245.157.67
addnode=174.3.172.7
addnode=179.5.60.238
addnode=204.11.237.233
addnode=210.195.21.254
addnode=24.118.83.49
addnode=24.209.156.81
addnode=24.238.194.219
addnode=24.56.61.247
addnode=31.25.28.142
addnode=49.144.155.125
addnode=62.210.114.57
addnode=67.161.20.189
addnode=79.146.84.160
addnode=82.5.49.193
addnode=85.17.172.116
addnode=91.232.105.11
addnode=93.108.48.48
addnode=94.226.17.1
addnode=95.211.148.215
addnode=95.220.222.119
addnode=98.181.27.169
addnode=98.247.221.102