Database information needed

To whom it may concern We are working with an old software program. We have to make changes on its database - but unfortunately we don't know - which database system was used. The database contains .dat files and .idx files. I will post two sample files here as well. Please don't come up with Foxpro - which it seems to be not. We need the name of the database and if possible a source where we can get an ODBC or XML connector. After we know the database we will place more projects. If you need any more information...please contact me.