I believe the following support page has a small error: https://portableapps.com/support/openoffice_portable#local_settings -
Under the heading "Copying Your Local OpenOffice.org Settings to OpenOffice.org Portable"
Just copy everything in that directory to the PortableOpenOffice\settings\ directory and you're all set.
This should be :
Just copy everything in that directory to the PortableOpenOffice\DATA\settings\ directory and you're all set.
I am using OO 3.0.0 Beta Portable.