"Open With" accidentally set for application installers.  How to reset?

Accidentally set "Open With" for an application installer to BBEdit and hit "change for all."
Now cannot launch installer, it wants to open with BBEdit or another application.
Is there a way to reset?

Solved. Problem was not actually with LaunchServices. I proved to myself that it was not LaunchServices by setting another filetype to open with BBEdit, then deleting LaunchServices, and seeing that filetype no longer open with BBEdit, while still having the problem. I should note that the problem was with a printer driver installer application, which I had set to open with BBEdit. (I was demonstrating to someone how you can set files to open with an application, not noticing I'd selected an installer applicaiton rather than a data-type file.) With no more LaunchServices.plist to delete, I still had the problem.
But here's what the problem ACTUALLY was: The installer had been posted to a Windows-based file server from a Mac using an AFP network protocol connection. I downloaded the file from the Windows-based server to another Mac using an SMB network protocol connection. As it happens, Resource Forks are encoded differently for SMB network connections than they are for AFP connections (and I am told for NFS or other protocols as well). So if you don't use the same network protocol connection to download the file as it was posted with, -you lose the Resource Fork. And in the case of this driver installer, the Resource Fork was critical, and so it could not launch correctly as I had downloaded it.
So I had thought the problem was related to "Open With..." -but it wasn't. As soon as I re-downloaded the app using an AFP network connection, it showed up correctly as an application with the correct icon, and launched normally.
Problem Solved!

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