Need some help tweaking code

I use Hummingbird Pro Asset Optimization feature to combine CSS and JS files (loaded from my main domain) that are used in every single site I build. Basically, a single set of code as a framework for other sites.

This works great — until I make a change to one of those core files. I then have to manually go into every site (almost 100) and clear the cache in order for the site to reload those files. What I am wondering is if there is a way to force the Asset Optimization cache to refresh every 24 hours or so. Even if it’s a function I can call with a Cron Job or something?