quicksilver/Quicksilver — pull request #1762 by pjrobertson (2014-01-30 06:22:14+00:00)
Title: Clear caches when downgrading as well as upgrading QS

As Rob and I discussed on quicksilver/elements.trigger.event-qsplugin#2, it's also often worth clearing caches when downgrading QS.

Anyhow, rescanning the catalog is hardly a big deal. I think this should go in v1.2 (but I'm pulling against master, I hope that's OK :/)