Clearing dashboard cache

I’m trying Umbraco 9 and decided to do a custom dashboard. I followed the tutorials okay and now would like to see some of my changes come through but my initial javascript is cached (like concrete). It survives stopping and restarting the App pool in IIS, trying to clear all caches using the Chrome Dev tools, a republish of the site from Visual Studio with deleting files before publish and a PC restart.
The stuff I’ve read says you need to increase the Client Dependency version in the config file but I can’t find that in Umbraco 9.
So the question is how do I clear the javascript file shown in the ‘sb’ folder in the screenshot below?


This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/109451-clearing-dashboard-cache