Thanks vmusic for the answer.
I'm not newbie in computers. Only that i'm focused on CISCO and networks in general. Programming it's a hobby for me.
Yes. You're right. That file it's possible to contain a lot of craps. But this is not the case.
About that database. Probably you don't know that I was trying for a week to identify that database.
1. The software is composed from an exe file and a DAT file. It has some registry keys to store the settings.
2. The extension of the database file is "magical":
.DAT 
(I know that is a generic one)
3. Trying to view the file in a HEX editor i got no clues, not even a known signature: i have attached the picture of it.
4. I have disassembled the exe file to view what libraries use. nothing (probably something OLE!? but...
5. I try to use programs like SmartDBViewer, OLEDBDirect BlueshellDataGuy. Nothing.
Please help me, or, at least, tell me from where or with what to start to identify what they used to create that database.
I don't want to be misunderstand. I don't want to put nobody at free work.
Thanks