Dude. In the words of the Terminator: "No Problemo".
Do you have ANY code-related hacks?
If no, then you are fine. If yes.. you will have to reapply the changes to the new files.
After
backing up your database, upload all the new files and go to yoursite.com/forumdirectory/install/upgrade.php , enter your customer number and follow the steps.
Easy as pie.
