Tasmota has a firmware upgrade option somewhere in it’s web interface (I haven’t used it for ages). Upload the official .bin file using that web interface and you should be back to factory default.
Home Energy Management in 2021.8 - Configuration - Home Assistant Community
Shelly EM Energy Display - Configuration - Home Assistant Community
Home Energy Management in 2021.8 - Configuration - Home Assistant Community
Configuring Shelly EM Energy Meter - Configuration - Home Assistant Community
Home Energy Management in 2021.8 - Configuration - Home Assistant Community
Configuring Shelly EM Energy Meter - #41 by duceduc - Configuration - Home Assistant Community
Home Assistant Energy Monitoring with Shelly EM - fuse-box install
Home Assistant Energy Monitoring with Shelly EM - fuse-box install
Shelly EM Power Logging with Home Assistant
Energy Monitoring in Home Assistant with not only Shelly EM
Configuring Shelly EM Energy Meter - #41 by duceduc - Configuration - Home Assistant Community
Home Assistant Show and Tell - Home Energy Systems - Carbon Co-op Community