Prior to this you have to Export list and copy the List.txt file on any accessible disk.
Note : if you did not do it, you can also use the save.txt file, automatically created by the software. See Automatic Save.
Indicate the location of the file to be imported.
1 - in Drive
2 - in Directory if needed
3 - select the file in TeXT Files .
Iit should be List.txt or Save.txt.
RapDate will analyse the contents of the file without importing it and will show you the number of reminders and the list of the 10 first reminders.
If it is the good file, accept the invitation to Import this file.