Changed 'Open with'

Hi Guys

I have inadvertently, (more like stupidly) changed the app. in the file info panel that opens a particular file and all similar files. In this case it was a poi file for a sat-nav. They are all set to open with 'Terminal' now. How do I reverse this Gaff? The trouble is, they didn't seem to open with anything in particular so it's not something I can find to change it back.

Frank

Ps. I have just remembered what it said 'open with' before, it said "not applicable"

So you don't want them to open with anything?

It's an IMAC with Snow leopard. It's not that I don't want them to open with anything It's what was displayed in the Get Info window before I changed it.

I suppose it's because it is opened with a Garmin device.

Frank