DP4 Hex File Editor/Viewer - can be used to examine low level contents of files.
This program is a simple Hex editor, which you can use if you do not have access to a more powerful utility of this type. It has one sigificant advantage over many similar programs - it does not need to read the whole file into memory when it starts up. It is therefore often very fast compared to other programs if you want low level access to large DP4 database files.
In an emergency, you can unset the flag which indicates that a database requires DBRECOV to be run, by setting byte 6C in the IND file of a database to 0. Using a database in this state can cause DP4 to crash, and there can be no guarantee of the data in the database.
The only command tail for this program is the name of the file to open.