You should backup all of the old software:
/cgidir (cgi directory, contains most of your board code)
/membersdir (member directory, contains, member data/pms)
/ubb (contains your forum data and the rest of the ubb script, including all of the noncgi files)

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.
Do you need Forum Install or Upgrade Services?
Forums: A Gardeners Forum, Scouters World
UBB.threads: UBBWiki, UBB Styles, UBB.Sitemaps
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