Logbook Pro will allow you to export your data as a .BAK or .LBK file and we've had excellent results with the .BAK exports.
See page 128 of this document for instructions: http://download.nc-software.com/docs/LogbookPro-Desktop.pdf
Please make sure that the file is Unencrypted so that we can access the data and convert it for you!
Please send the file to us and we'll be happy to convert and import your complete data!