Remove "Try Acrobat Pro" buttons from Acrobat Reader

Edit the registry, and add in
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Policies\Adobe\Adobe Acrobat\DC\FeatureLockDown

bEnablePersistentButton = dword 32, value 0
bAcroSuppressUpsell = dword 32, value 1