I'm working on some ArcGIS Pro add-ins and all of the sudden it appears that I cannot see or access the add-ins in Pro. I'm running the add-ins from Visual Studio 2015 debug mode, as documented in the ArcGIS Pro SDK Community Samples. However, the add-ins are no longer visible anywhere in Pro, either in the Add-in tab or elsewhere. I didn't change any settings in Pro or make any other system changes that I'm aware of that could possibly affect ArcGIS Pro. I do not see anything in the Add-In manger when Pro starts in debug mode:
How do I set Pro to once again detect the add-ins I am working on in Visual Studio?
System specs: Windows 7 64-bit, ArcGIS Pro 2.0.0, Visual Studio 2015