Yeah, I have been sitting on this newest update much longer than I anticipated. Partially because of some new requests that came in that I want to see if I can fit in, to make sure I've allowed enough time for testing, and because very few people are timing right now so there hasn't been much demand for any of the new features to be released immediately. The display of the last participant to leave the starting line (and how long ago they left) is in this next update.
As for the setup - Yes, you'll have one system at the start doing nothing but capturing chip start times. With the starting line computer - on the "RFID Readers" tab you'll make sure the "Auto Save" checkbox is checked. This will periodically (every 15 seconds is the default) save all of the chip start times that were captured out to the database. On the "Action Keys" tab you can check the box that says "Auto Copy". This will automatically save a copy of the database out to whatever path you specify in the "Backup Database Location".
If the start and finish are too far away from each other to be networked together you can email the database (from the backup location), use DropBox, or any other method to get the database file onto the finish line computer so that you can "Import Chip Start Times Captured Remotely" (located at the bottom of the RFID Readers tab).
You can import chip start times as often as you want, and there is no concern if you import the same file or an older file by accident because the software will only accept the chip start time being imported if it's more current (or after) the time it already has for the athlete.