Sorry to hear you are having issues.
Can you show us a Screenshot of your app , and click on edit and check if you
hear the added changes . When a sound pack is made just some of the windows
sounds may be changed while other Windows sounds remain .
See my Screenshots below .
And you need to Click on " Appy sound pack "
then go to edit to hear changes.
I'm running Win10 H0H2
Stardock Community Assistant