In addition to my previous post the Magix music styles or soundpools are designed to work with Magix software.
Trying to use them in non Magix programs raises some issues -
- one of the issues is, as you have found, the BPM settings cannot be changed due to the other software not being compatible with the way the music styles and soundpools store their bpm information.
- the other issue may be that of licensing - by changing (reverse engineering) the music styles / soundpools to work with other software you are breaking the licensing conditions under which you purchased the software.