Microsoft Edge does not allow ActiveX plug-ins so use IE 11.
Also, do you have 2.0->3.5 framework installed?
If not see this KBA from MS on how to enable/add it:
See if that works and let us know?
I did some more testing and it seems to work setting the project to 3.5 framework bu nothing higher so I suspect R&D needs to make CR for VS 4.6 aware.
Only option is to wait for SP 15.
Don