To fix this all I did was open the template inside the templates folder with explorer; that is the zipped WindowsUniversal.zip file.
Edited the WindowsUniversal.vstemplate file in Notepad [This can be tricky so set it [Notepad] as your default using an extracted copy and then try to open the zipped version inside the zip template]
’
Microsoft.VisualStudio.WinRT.TemplateWizards, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Microsoft.VisualStudio.WinRT.TemplateWizards.ApplicationInsights.Wizard
’
Delete that part near the bottom, you could probably do a Find with this exact phrase… if the token is the same… I made no other changes at all to the zip file contents [The file opens in notepad with everything running as a single line so will look a little messy].
Notice I included the trailing 4 spaces in that snippet. and for some reason the preview was showing the beginning ’ and < on separate lines but there are no spaces at the beginning of my snippet, and then just save it on closing the file.
Went to create a new project…
And viola, no more error message… project created successfully and compiled and ran. both debug and release.
Additional data: Windows 10AE Fully Updated, VS 2015 U3.
For those of you whom like a back story [As I do 
]
I followed both mentioned methods above and neither worked…
However thanks to the contribution by parsec I was able to identify the precise issue at hand, following his/her method lead to no template option being shown… which is I presume due to the lack of whitespace, or that the zip required some other form of packaging? [Just a theory] Anyway I figured why not just isolate a particular part and it worked, somehow my subconscious decided to just edit the .vstemplate inside the zip file, kind of like IVF treatments no? haha.
Anyway I just felt I should contribute this method back to help others too.
Time to get coding!
Hope this helped,
Valentine