Wrong icon for mp4 files

I have *.mp4 files with a full white icon (I'm not sure why), I have reinstalled the Mega package many times selecting to reset all filters settings and enable file associations but it doesn't change the full white icon on *.mp4 files.
Why?

Codec Tweak Tool > Fixes > Clear Windows icon cache
Then reboot.

Nothing is changed.
Is it possible that the codec pack if see that the file association already exist doesn't refresh it (even when selected)?

No, it should fix the association during installation.

This is the registry key:
HKEY_CLASSES_ROOT\mplayerc64.mp4\DefaultIcon

I have discovered the problem, the icon set is correct but the NeroDigitalIconHandler cause it to not appear.
Could you consider auto-disable it?

Code:

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\mplayerc64.mp4]
@="MP4 Video File"
"PreferExecuteOnMismatch"=dword:00000001
"PreviousRegistration"="WMP11.AssocFile.MP4"

[HKEY_CLASSES_ROOT\mplayerc64.mp4\DefaultIcon]
@="\"C:\\Program Files (x86)\\K-Lite Codec Pack\\MPC-HC64\\mpciconlib.dll\",3"

[HKEY_CLASSES_ROOT\mplayerc64.mp4\shell]

[HKEY_CLASSES_ROOT\mplayerc64.mp4\shell\open]
@="&Play with MPC-HC"
"Icon"="C:\\Program Files (x86)\\K-Lite Codec Pack\\MPC-HC64\\mpc-hc64_nvo.exe,0"

[HKEY_CLASSES_ROOT\mplayerc64.mp4\shell\open\command]
@="\"C:\\Program Files (x86)\\K-Lite Codec Pack\\MPC-HC64\\mpc-hc64_nvo.exe\" \"%1\""

[HKEY_CLASSES_ROOT\mplayerc64.mp4\ShellEx]

[HKEY_CLASSES_ROOT\mplayerc64.mp4\ShellEx\IconHandler]
@="{B327765E-D724-4347-8B16-78AE18552FC3}"

[HKEY_CLASSES_ROOT\mplayerc64.mp4\ShellEx\PropertySheetHandlers]

[HKEY_CLASSES_ROOT\mplayerc64.mp4\ShellEx\PropertySheetHandlers\{7F1CF152-04F8-453A-B34C-E609530A9DC8}]

Code:

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\WOW6432Node\CLSID\{B327765E-D724-4347-8B16-78AE18552FC3}]
@="NeroDigitalIconHandler Class"
"AppID"="{DB6E479C-57FF-4CD5-A519-676480696808}"

[HKEY_CLASSES_ROOT\WOW6432Node\CLSID\{B327765E-D724-4347-8B16-78AE18552FC3}\InprocServer32]
@="C:\\Program Files (x86)\\Common Files\\Nero\\Lib\\NeroDigitalExt.dll"
"ThreadingModel"="Apartment"

[HKEY_CLASSES_ROOT\WOW6432Node\CLSID\{B327765E-D724-4347-8B16-78AE18552FC3}\ProgID]
@="NeroDigitalExt.NeroDigitalIconHandler.1"

[HKEY_CLASSES_ROOT\WOW6432Node\CLSID\{B327765E-D724-4347-8B16-78AE18552FC3}\Programmable]

[HKEY_CLASSES_ROOT\WOW6432Node\CLSID\{B327765E-D724-4347-8B16-78AE18552FC3}\TypeLib]
@="{8042010C-0400-41A1-B344-85F0D08F4F41}"

[HKEY_CLASSES_ROOT\WOW6432Node\CLSID\{B327765E-D724-4347-8B16-78AE18552FC3}\VersionIndependentProgID]
@="NeroDigitalExt.NeroDigitalIconHandler"

Yes, I shall make it remove those additions to the keys from MPC.