Just to check: did you actually try and install the drivers from 1.4.0 on your XP PC? It seems strange that XP drivers would actually have been removed.
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.
I'll update the Quick Start on the website, but version 1.3.1 is available here now: https://github.com/espruino/EspruinoDocs/blob/master/files/stm32_vcp_1.3.1.zip
and should hopefully work for you on XP.
Just to check: did you actually try and install the drivers from 1.4.0 on your XP PC? It seems strange that XP drivers would actually have been removed.