For Ubuntu user:

$ sudo vi /etc/openoffice/sofficerc
< password >

Other Linux distribution

Login as root

$ su
< password >
# vi /usr/lib/openoffice/program/sofficerc

Change "Logo" value from 1 to 0 then save

NOTE: In your distro the "sofficerc" file could be in a different location, the command "# find / -type f -name sofficerc" will show you where.