OK I had a system lock-up necessitating a hard reset.  Now Bitcoin won't start:

   EXCEPTION: 22DbRunRecoveryException       
   DbEnv::open: DB_RUNRECOVERY: Fatal error, run database recovery       
   bitcoin in AppInit()

Can I just delete and re-run the script? There was nothing in the /bitcoin folder I needed.  In fact I don't think it ever created a wallet.dat file