Okay, you found the four UK steamer sound files for the LokSound V4.........just download the one you like the best. There's no basic difference between a tank steam locomotive (Thomas) and a steam locomotive with a tender. The first carries its own water and fuel, the second pulls a tender with it. The main difference in steam locomotives is the size of the locomotive, the larger ones can make a heavier, more pronounced chuff shound, than smaller steam locomotives.
You must have a very old version of the ESU LokProgrammer. All the newer ones use a USB cable for a PC. I just download the sound file to my PC, then click on the sound file and it will automatically start up the LokProgrammer with the decoder connected to a locomotive's motor block, or connected to a test stand motor block like I use for setting up decoders. Once you get a hang for using the LokProgrammer, it's very easy to set up a decoder's mapping and Function Outputs and Voltage Settings for lights, smoker, etc, for the decoder's AUX terminals and F Key assignments. The best way to learn using the LokProgrammer is to get someone to walk you through the process on the phone with you and the experienced person with each having their LokProgrammer activated. It's also important to have the LokProgrammer's latest firmware software downloaded and installed into it.
The ESU sound decoders are far more complex and capable than the Massoth sound decoders, thus the complexity of the ESU Installation Manuals. But the capabilities and quality of the sounds are superior to Massoth, and I'm a dealer for both and use both in customer installations. And ESU has the larger, more extensive sound library. For a Bachmann tank locomotive, either brand decoder will work well.