Well, if you haven't modified any of the player data, leagues, or seasons since moving the database, you can always just nuke your new database and copy the one from the "old" PC. Player data includes only the stuff you can modify on the Database tab (personal information: name, address, email, phone, etc).
To give it a try, open Windows Explorer, go to "C:\Program Files\The Tournament Director 2", rename the folder "db" to something else, and copy the "db" folder from the old computer. Start the TD, see if it looks better. If it doesn't, you can always nuke the "db" folder, and then rename the original back to "db". You'll be no worse off than you are now.