Did I brick my ESP8266 ESP01 on Pico?

I just tried flashing via the IDE again - here's what I did:

• I checked the current version via IDE, and it reported AT version: 0.25.0.0, SDK version 1.1.2, Compile time Jun 17 2015
  
• set GPIO0 pin to GND on the ESP101 board
  
• clicked the firmware update button
  
• noticed the IDE reported: syncing..
  
• noticed the blue LED on the ESP01 flashing
  
• after about 10s the IDE reported: "The Firmware update failed: No response to sync".
  
  

BTW I have wondered about those later versions which appear to contain a boot loader and other code, so I guess the IDE is only loading the needed part.

I'll keep looking into the later version as an experiment.