Save a Family Tree as a GEDCOM file
From Genea-Doc
When you've created a family tree, you can save it as a Gedcom file.
Chose Family Tree - Save - As a GEDCOM file. You have to select the file to which the family tree should be written. After this, you can select further options.
After clicking OK, the Gedcom file is written.
Please note, that saving images currently doesn't work. This will be fixed in future versions.