That issue was hammered out in an earlier thread.
The problem with many of PowerDirector's default menus is the first video that plays has its own audio, so therefore can not be removed.
If you choose a menu that does not have a Video played in the beginning, then you can remove the menu music.
In PD8 there is only one menu that does not play a video.
Here is that thread.
http://forum.cyberlink.com/forum/posts/list/18818.page#97869
Carl312: Windows 10 64-bit 8 GB RAM,AMD Phenom II X4 965 3.4 GHz,ATI Radeon HD 5770 1GB,240GB SSD,two 1TB HDs.