If one wished to manually update for any reason, would one need to change anything outside of the the app folder, or be concerned with anything else?
2 Answers
Only the /app folder matters.
No other files are relevant to the Craft core operations. Make sure you replace the folder entirely, don't let the new files get merged with the old files.
Nothing else will be changed. If the update would trigger any database changes, those will be handled automatically by migrations (located in the app/migrations folder).
For more information, see the documentation on Manually Updating.
I would also recommend using the one-click updating feature to make sure the updates are installed correctly. This feature is really quick and handles everything for you.
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2I should have said the question assumes this was the first step, and one wishes not to trouble the support team when one might be able to fix the issue relatively painlessly by downloading the update and overwriting the app file.– cmcjaneCommented Jun 20, 2014 at 6:39