When I installed Dynamo Studio I lost the Dynamo button in Revit 2017

I installed Dynamo Studio today and the Dynamo add-in is no longer available in my Revit 2017 (I know it’s supposed to be in the Manage Tab). I’ve reinstalled Dynamo Studio, I’ve repaired then reinstalled Revit 2017 but it hasn’t fixed it. Can anyone help?

I reinstalled Dynamo 1.2.1 and it’s now fixed