The new 2.3.5 release resolves the DNN6/7 issues.
https://nbstore.codeplex.com/discussions/443329
That thread lists all changed settings and templates.
Steps for resetting individual settings and templates to the latest defaults after an upgrade are at the end of this page:
https://nbstore.codeplex.com/wikipage?title=Step%20by%20step%20guide%20to%20a%20working%20store&referringTitle=Documentation
https://nbstore.codeplex.com/discussions/443329
That thread lists all changed settings and templates.
Steps for resetting individual settings and templates to the latest defaults after an upgrade are at the end of this page:
https://nbstore.codeplex.com/wikipage?title=Step%20by%20step%20guide%20to%20a%20working%20store&referringTitle=Documentation