We don't really recommend replacing the PowerStore 2 files with the PowerStore 3 files because you will lose a great deal of new functionality added in PowerStore 3.
For example, all the front-end pages for PowerStore 3 have some degree of content management added to them and the Home page contains a great deal more dynamic functionality than before.
If you added a lot of your own custom code to the PowerStore 2 pages, you may be better off simply copying the custom content to the new pages manually. That way, you can retain the new features.
With that said, the file names for the front-end pages are pretty much all the same, so you could simply replace those as well, and the links should still work in most cases. However, for the Admin pages, there are probably too many changes and additions for this to really work properly.
