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.
Configuring Shelly EM Energy Meter - #41 by duceduc - Configuration - Home Assistant Community
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Since SENEC Application v0825 & v0826 no STATISTIC data is provided [No Data for multiple Sensors] · Issue #4 · marq24/ha-senec-v3 · GitHub
Whole Home Energy Monitoring
Setting up Power and Energy Monitoring with a Shelly EM and Home Assistant, by Cyan Automation
Home Energy Management in 2021.8 - Configuration - Home Assistant Community
Energy Monitoring with Shelly EM and Home Assistant - James Ridgway
Configuring Shelly EM Energy Meter - #41 by duceduc - Configuration - Home Assistant Community
Configuring Shelly EM Energy Meter - Configuration - Home Assistant Community
Configuring Shelly EM Energy Meter - #41 by duceduc - Configuration - Home Assistant Community
Energy Monitoring with Shelly EM and Home Assistant - James Ridgway
Whole Home Energy Monitoring