I have an issue with a custom file extension that I've added in the registry, I've followed all steps, reviewed the .ico file path, deleted the associated registry entries and tried again, rebooting Windows and nothing.
Due I have low reputation points I can't add an image, but the file with the custom extension has an icon with the white sheet and the application icon in the center of it.
The extension is .mqs and it's in the registry as .mqs with MQSFile value in HKEY_CLASSES_ROOT, and the second key named MQSFile in HKEY_CLASSES_ROOT default value is "Encrypted MQS script" and DefaultIcon value has the icon path "C:\Program Files\MQS\resources\folder_icon.ico"
So what's wrong, the registry keys? Or the icon cache?