The IDE & website tries pretty hard not to do caching for modules so they can be updated pretty easily.
If you don't have the module URL tweaked, do you have Offline mode turned on? That could do it.
@Gordon started
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.
The IDE & website tries pretty hard not to do caching for modules so they can be updated pretty easily.
If you don't have the module URL tweaked, do you have Offline mode turned on? That could do it.