Adobe Pro 9.5 is set as default app but Adobe DC opens instead

[Steph5C46]

I have set system default to open all PDFs using Adobe Pro 9.5 but Adobe DC opens the document instead. I've tried changing it in properties on a document. I click on the Adobe Pro 9.5 but it will not change  

[Test Screen Name]

Adobe don't support mixing versions. If you mix apps, you just have to give up any expecation of double click as a way of opening PDFs.