Just follow these steps:
Close the wallet.
Open your Espers data folder and delete the file "peers.dat"
Edit Espers.conf and delete all lines that start with “addnode=…”
Copy and paste these lines into your Espers.conf:
addnode=37.139.186.138:22448
addnode=144.76.78.141:22448
addnode=217.61.4.198:22448
addnode=212.237.32.138:22448
addnode=80.211.178.121:22448
addnode=81.202.164.230:22448
addnode=207.246.108.125:22448
addnode=193.31.25.111:22448
addnode=46.4.27.201:22448
addnode=194.67.221.52:22448
addnode=86.4.194.75:22448
addnode=108.61.175.156:22448
addnode=31.192.147.20:22448
addnode=42.51.33.196:22448
addnode=149.56.154.75:22448
addnode=217.61.6.53:22448
addnode=194.182.65.33:22448
addnode=80.211.203.239:22448
addnode=194.87.235.171:22448
addnode=94.130.64.143:22448
addnode=110.169.49.26:22448
addnode=198.245.50.213:22448
addnode=92.125.140.58:22448
addnode=94.177.246.216:22448
addnode=159.89.114.40:22448
addnode=218.49.34.36:22448
addnode=80.211.27.133:22448
addnode=80.211.102.238:22448
addnode=80.211.102.142:22448
addnode=80.211.242.126:22448
Step by step how to do
Snapshot how to
https://blog.espers.io/using-the-snapshot-d8eb6d1cb3f6
Setting up the Espers wallets
https://blog.espers.io/how-to-install-espers-wallet-on-the-raspberry-pi-d6837d477ca8
Espers Wallet on the Raspberry Pi 3
https://blog.espers.io/getting-espers-wallet-and-setting-it-up-1ac91c0bfd21
This and more can be found on our blog
https://blog.espers.io