Not sure exactly how i got to this point but i was trying to reinstall the ESP8266 board definitions into my Arduno IDE (Windows 1.85).
I put this line in preferences
http://arduino.esp8266.com/stable/packa ... index.json
But it seems to fail on trying to download the following line https://github.com/esp8266/Arduino/rele ... -2.4.1.zip
I can put this in the browser and download the file but i cant see why the IDE fails.
Any ideas?
I did try a Java setting i found but no difference
(setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true)
Paul