I have never (in my 15+ years of database programming) heard of that extension.
It is either some proprietary file, or someone for security reasons has renamed the extension from one of the 'standard' db extensions.
All I can suggest is that you do a Google on that extension and see if you can find something to run it.
Failing that, try renaming the extension to various standard names and see if you can get an app to recognize it.
Oh, and by the way, it isn't a dumb question to you if you don't know the answer. I've asked many a "dumb" question in my life.
Well, you would first have to determine what it is before you could determine what tool to use. From there, you would have to hope the creator of the file didn't use some sort of encryption/encoding to store the data securely.
Next in line would be low-level file operations. Determine the format or structure of the file, then how it's laid out, then try to parse it.
It could range from simple to monumental.