Locking Adobe Acrobat DC as the default program

[Guest]

Hello team,

We have computers where both acrobat Dc Pro/Std  and Acrobat Reader is installed. I followed below link

Installation options — Acrobat Customization Wizard DC for Windows

I have done the below registry change to lock down Adobe Acrobat as the Default program and reboot the computer. After the reboot the default program changes bac to Adobe Acrobat reader. The below mentioned registry key is not working for me

Locking PDF ownership¶

By default, users can select the default handler through the UI. However, administrators can lock the feature by setting [HKLM\SOFTWARE\Policies\Adobe\<product>\<version>\FeatureLockDown\bDisablePDFHandlerSwitching to 1 so that end users cannot change the default handler.

I don't know where I am doing wrong,please help me in fixing my issue.

Thank you