Currently there is an issue when trying to delete devices that is not zwave or zigbee (adapters/integrations)
Removing/uninstalling a adapter will not automatically remove devices.
  • Go to the device setup
  • Find the name of the "adapter" and the name "address" of the device
  • Open thingsplex in a web browser
  • Go to registry
  • Select Settings
  • Enter the adapter name and address of the device you want to remove and press send.
Repeat the process where each device will be removed one by one from the App.