After upgrading Articulate Presenter 13 all add-ins are gone

Hello,

I have upgraded Articulate Presenter 13 this morning (last version available).  Since, I can't work in Articulate anymore.  I still see the Articulate tab in PowerPoint.  But the buttons on the ribbon are disabled (click without action).

I have followed step by step the procedure shown here : http://www.articulate.com/support/presenter-13/the-articulate-tab-on-the-powerpoint-ribbon-is-missing-736

The problem remains.  The add-ins have disappeard.  In PowerPoint Options I don't find them at all : 'disabled items', 'PowerPoint Add-Ins' are empty.  In 'COM add-ins', Articulate Presenter Communicator and Articulate Presenter Ribbon are marked.

Could anyone be able to explain me what to do ?  It would very kind of you.

Thanks.

Etienne

Articulate Presenter 13 : Update 2 1402.2817

PowerPoint 2010 14.0.7116.5000 (32 bit)