I've had an error screen on start-up.

When I started the program I got this error message.

System.Data.SQLite.SQLiteException (0x80004005): database is lockeddatabase 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)

Any ideas?

Hi Stephen,

this issue can occur when some application is using/accessing eM Client database at the moment of launch.
Try restarting your computer and run eM Client again.
If issue still persists please disable all applications that could be affecting eM Client(Firewall, Antivirus or some backup program).
Please let me know if it helped.

Best Regards