Hi Vero,
Thanks! Bear with me... I'm moving over to Alfred from LaunchBar, so I'm not as familiar with Alfred as I would like. I wasn't aware I needed to prefix "open" to work with documents, as that's not the case with LaunchBar. Looks like I'll have to get myself in the habit of typing "open" to work with documents.
I'm still a little confused about this though, because when I just type "reg" (without the "open" prefix), I do see other documents that match "reg" in the list (including RTF, archives, and scripts) as well as some matching applications and browser bookmarks.
And even more confusing, when I just tried typing "open reg" and "open registration" I still didn't see the disk image alias in the list. Hmmm...
Edit: I just tried raising the Preferences > Features > File Search > Result Limit up to 40, and while I still don't see it in the list when I type "open reg", I do now see it in the list when I type "open registration". So apparently it was too low in the list without me typing more of the name!
I think it would probably be helpful to be able to see more than 40 matches in some cases, especially starting with a new install where there may be many unprioritized matches to sort through to find what you're looking for! There's no way to do that, is there? On a related note, LaunchBar has an Index window where you can view and search its index to see what it contains and what a search term matches. Is there a way to view Alfred's entire index?