6
Other module, you mean pm and profile?
Update them too.
In my opinion:
:: php file modified in new version -- >> need overwrite files;
:: if any MySQL changes or mainfile.php changes for the new version -- >> usualy is provided an upgrade php script that add MySQL tables, alter tables ... an so on, so upload files overwrite, run upgrade script, update modules (system, pm or profile ifany changes on them) that should manage other changes;
:: if there are templates changes in new version, than after overwrite file update modules is needed (from package - system, pm, profile - I mean that modules that are actually modified);
Now, lets see the changelog -- please read changelog.txt
So, I think you should just overwrite the files ( except mainfile.php ), update system, pm and profile modules, and than delete files from templates_c folder (except index.html).
Don't follow me. I'm lost too.