crash and reboot with error message

Hi, eM Client crashed on me, and then when I wnet to reboot it, I got an error message to contact eM Client support with this info:  

System.Data.SQLite.SQLiteException (0x80004005): database is locked
database is locked
   at System.Data.SQLite.SQLite3.Step(SQLiteStatement stmt)
   at System.Data.SQLite.SQLiteDataReader.NextResult()
   at System.Data.SQLite.SQLiteDataReader…ctor(SQLiteCommand cmd, CommandBehavior behave)
   at System.Data.SQLite.SQLiteCommand.ExecuteReader(CommandBehavior behavior)
   at System.Data.SQLite.SQLiteCommand.ExecuteNonQuery()
   at MailClient.Storage.Data.DataStore.GetConnection(String relativeName)
   at DbRepair.CorruptionChecker.CheckCorruption()
   at DbRepair.FormCheck.Check(Object state)

What does this mean?  Can anybody help me?  

My eM was locking up and on restart the data base check would fail, if I closed and restarted a second time the data base check would pass and everything would be fine for a few days until it crashed again -  then two data base checks would get me going again.  I discovered my anti virus software (Bit Defender) was blocking the application. I set to allow eM to make changes to my PC and I believe the problem is corrected.  Sorry I did not save the detail error report, or I would include it here.  Hope this helps.

I had tried it two separate times since the original crash, but decided to give it one more go, and voila!  Thanks Henry Burt!