just go into the setting click on relays and add or remove what you like. sometimes the relay may add automatically.. it has for me in the past..

also you can try my relay if you like

http://5nor2k2vnqhmyo2gnbwyqbbzfcehz6fvvxnpy5ycue32aoojyujbt2yd.onion/wallet?usr=730660489a41415ab0005ad0fc5675eb&wal=25aa1f2813b8498b8a855d1e52158de1