Capella VPMS v0.18.1 Problem

Hello,

I want to create configurations in Capella. I downloaded vpms add-on (VPMS v0.18.1 also v0.18.0) but I cannot set “active”. I tried right-click then choose “reference” but there were no additional features about add-on.
Did I miss something?
I have 5.0 also 5.1

Capture2

Thanks for your helps.

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