It should sync in a couple minutes.
Regarding the need to delete data files, here's what I've observed...if the wallet is 100% in sync with the network and you exit the client, it shuts down everything correctly. If the wallet is out of sync in any way and you exit, it will throw an error and you will need to delete the data folder to restart.
The client syncs so quickly now this is just a minor issue until the dev get its corrected.