I had the same problem, but I realized a little that it was the style that caused my templates to change. (I did not code some time after installing the new version of the style)
In any case, to fix this problem, I installed the latest version of the style and then not installed. They fixed the installation of a later version to ensure that your visual studio templates revert to vs templates by default.
Finally, I installed the latest version again, and during the installation I made sure that Exclude updating visual studio templates .
I hope this helps someone else.
Brian
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