Defualt apps XML for Windows 10

Has anybody been succesful in getting the XML from Default Apps in Windows 10 to get ADE as the default app for ACSM files?

I've set and unset it as the default app in Settings, but it never appears in the list. We use a central apps list in Group Policy and, even though ADE is installed on our network PCs, the files are defaulting to Acrobat DC. 

I've tried

<Association Identifier=".acsm" ProgId="Applications\DigitalEditions.exe" ApplicationName="Adobe Digital Editions 4.5.10" />

but that doesn;t seem to work