Very strange to hear that the WebIDE is causing you issues, in my expericnes its very reliable. However if you wish to, you can use the Espruino NPM Module and set it to watch a file, then you can use Sublime Text to exit a local JS file and every time you save it, it will be sent to the Espruino.
You could also try to use the WebIDE as a native windows program, here's where to get it.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Very strange to hear that the WebIDE is causing you issues, in my expericnes its very reliable. However if you wish to, you can use the Espruino NPM Module and set it to watch a file, then you can use Sublime Text to exit a local JS file and every time you save it, it will be sent to the Espruino.
You could also try to use the WebIDE as a native windows program, here's where to get it.