Thanks for the information.
Custommodeapp.exe is available when you install latest video drivers for your graphics controller.
Please try to find the path manually:
- C:\Windows\System32.
- Look for the Intel application named CustomModeApp.exe or CustomModeAppv2_0
Download the latest driver here:
Bay Trail - Download the Windows 8.1/8* 32-bit driver, Windows 8.1/8 64-bit driver, or Windows 7 64-bit driver
Allan.