Programs enabling conversion of the file:
If your objective is to convert the file from B5I to the file NRG, you can use any of the applications listed. B5I to NRG conversion process in every program intended for this purpose (so-called converters) is very intuitive and everyone is able to manage converting a file.
However, bear in mind that the list may also include programs to support and work with the indicated extensions B5I and NRG - and not only converters. In such a case, you need to open the source file B5I and from the options available in the program, choose ”Save as... NRG" or "Export to NRG".