I did a fresh install of MacOS Lion on my MacBook. I had a Time Machine backup of my Snow Leopard installation. I installed the latest version of the Garmin Training Center software to export my running history from my Garmin Forerunner 305. I needed to restore my old data from my Time Machine backup. It took me quite a while to determine the file and location of the database file. The file you need to locate has an gtc extension. I used the default installation path in both Snow Leopard and Lion. My database file was located in ~Library/Application Support/Garmin/Training Center. I simply had to replace the database file created at install (Training Center.gtc) with the file of the same name from my Time Machine backup. And that was it. It took me longer to find the file location than to do the restore.