MyBB Community Forums

How can I upgraded to the latest version of mybb without dropping all the changed files in as that would override my changes to various files.

You can't really, unless you want to spend a lot of time manually applying every change we made - when editing core files you should really make a note of the changes you've made so you can apply them again in future. If you haven't done this, then your best bet is probably to view a diff against the original versions of the files you've edited, make a note of your changes, upgrade, and then you can make your changes again.