connection between Libre and Open Office

OpenOffice became LibreOffice.

       As for the header; I'm not sure I understand the question -
            neither OO nor LO should be noticeable on your form
          unless, for some reason, you've added that as your header for the
document.

George,
If new files are experiencing this problem, then it sounds like your default template is not clean.

First, check the Tools -> Options -> Paths paths to be sure nothing is pointing to the OpenOffice directories. Especially the "Templates" path. If the "Templates" path is set to the OpenOffice templates path, then the OpenOffice default template could be used for new documents.

If the paths are okay, then open a new document and/or spreadsheet and then look at File -> Properties and verify they are blank. If not, and the "Title" property in the "Description" tab is set to "OpenOffice", then you will have to make the change(s) to the template properties and save it as the new default. That should correct the problem with new documents.

For old documents or spreadsheets, check the problem ones by opening them and check the properties as with the new file procedure above. If your spreadsheet or document has the "Title" property set to specify "OpenOffice", and the Title "field" is inserted into the document or spreadsheet, then it will always be OpenOffice until that property is changed. The file properties are set in the document and will follow the document, not the application.

As a last resort, you might try deleting or renaming the LO user profile.

HTH.
Girvin Herr