Yep.

In fact, that's the safest but longest way to upgrade - if a file hasn't changed and you upload it, so what? <img src="https://www.ubbcentral.com/boards/images/graemlins/smile.gif" alt="" />

Just make sure you don't overwrite your vars files (wordlets being the exception: you WANT to overwrite those with the new ones)

Graeme