error message / program won't start any more

Since today, I am getting the following error message when trying to start eM Client:

System.Data.SQLite.SQLiteException (0x80004005): Some kind of disk I/O error occurred
bei System.Data.SQLite.SQLite3.Open(String strFilename, SQLiteOpenFlagsEnum flags, Int32 maxPoolSize, Boolean usePool)
bei System.Data.SQLite.SQLiteConnection.Open()
bei DbRepair.DbTools.OpenConnection(String fileName)
bei DbRepair.Form1.CheckCorruption()
bei DbRepair.Form1.Check(Object state)

sorry for the delay. Does the problem persist? It seems that some other program is accessing your database - do you use any backup software?