This bizarre. I install Dynamo 1.0.0. It runs through the install process. But when I look in Revit 2016 there is no Dynamo tab. I look in Appdata/revit/addins folder, no .addin file for Dynamo. I look in Program Files folder and there is a Dynamo folder but it is empty.
I redownloaded the install file and tried to install it a couple more times. Same result.
Other add-ins and exe installed fine (e.g. Model Checker).
Has anyone had this problem?