You'll want to upload the files from the version you're already running; you'll want to omit the includes/ styles/ and cache_builders/custom directories (as they contain data for your forum that will be overwritten).

The only time you'll need to run the upgrade script is if you install a newer version than what was installed.

I am a Web Development Contractor, I do not work for UBBCentral. I have provided free User to User Support since the beginning of these support forums.
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