If you get the .startup file missing error when starting the IDT Audio control panel then you are running the newer audio drivers that alienware/dell neglected to pack with that file.
I have included the old .startup file in this folder. You can download this file and place it in X:\Program Files\IDT\OEM and X:\Program Files\IDT\OEM\Dell
Reboot and the control panel should work.
If you do not want to do that you can download the rebundled version I packed with the startup file installed. Just reinstall and it should operate fine from there out.
Right click and save as.
Either way, enjoy a working control panel now!