You can save a map in MindManager 2002 format (.mmp file) so it can be opened by the previous version of MindManager.
To save a map in MindManager 2002 format:
Click File - Save As...
In the Save as list choose MindManager 2002 maps (*.mmp).
Shortcut: Click File - Export - Mindjet MindManager 2002.
When you click Save a new map is created in MindManager 2002 format. This map can be opened by MindManager 2002 and later versions.
In general, your 2002 map will look similar to the original map, but any map elements that are not supported in MindManager 2002 are not saved in the new map. This includes:
topic line color (line color is not used)
topic shapes (central topic shape is retained)
some relationship and boundary styles
some icons (replaced with the Information code)
subtopics of floating topics
floating topics with both text and images (only the text is used)
hyperlinks on the central topic
some Notes options (table border color, table width and column width)
text markers
bookmarks
custom properties
spreadsheet topics
attachments
Outlook items
Excel items