Clearing the launch history wouldn't have anything to do with this. All the items that I have launched (and are in the history), are in fact ones I want to appear. It is the ones I would never launch, that I'd like taken out of the results--specifically, documents (like I said I use Google Desktop search for that). I have never launched from FARR, a document, and yet my searches always end up with documents at the top, and I can't find even folders that I have launched in the past, in the results.
At any rate, in a year or so I'll come back to this and check out the release notes for subsequent versions. I have tried looking all over for alternatives to Launchy, and this is the only one that was faster than it, that did what Launchy does.