OpenOffice 3.0 incorrectly installs the OpenOffice document IFilters. The IFilter (ooofiltproxy.dll) has a dependency on the file uwinapi.dll which is no longer in the path.
If you want to use FileLocator Pro to search through OpenOffice file types, such as ODT, SXW etc., then you will need to add the path of uwinapi.dll to your environment settings.
In a standard installation the additional path required is:
C:\Program Files\OpenOffice.org 3\URE\bin
There is a bug report filed against this issue here:
http://www.openoffice.org/issues/show_bug.cgi?id=100259