To upgrade the All-In-One setup manually:
Login to Raspberry Pi zssh pi@your_raspberry_pi_ip
Change to homeassistant user 

sudo su -s /bin/bash homeassistant

Change to virtual enviroment 

source /srv/homeassistant/homeassistant_venv/bin/activate

Update Home Assistant 

pip3 install --upgrade homeassistant

 

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