IDeckLinkProfileAttributes not found

I am testing with SDK Blackmagic DeckLink SDK 11.1 the StillsCSharp project and send the following error:
"The name of the type or namespace 'IDeckLinkProfileAttributes' could not be found (missing a using directive or an assembly reference?) StillsCSharp"

Can someone help me with the class, please?

[Cameron Nichols]

Hi Cristhian,

IDeckLinkProfileAttributes interface object was introduced in Desktop Video 11.0. Please ensure that you are running the latest Desktop Video release, not just the SDK.

Regards
Cameron