Port for MySQL not saved in Data Sources

I've succesfully created and tested mysql schema on non default port, when adding new data source.
After closing Data Sources i've got error, then port has been changed to default 3306


Remote Desktop Manager v8.0.8.0/Windows 7 x64
[12/9/2012 2:16 PM]ERROR MySql.Data.MySqlClient.MySqlException: Unable to connect to any of the specified MySQL hosts.
at MySql.Data.MySqlClient.NativeDriver.Open()
at MySql.Data.MySqlClient.Driver.Open()
at MySql.Data.MySqlClient.Driver.Create(MySqlConnectionStringBuilder settings)
at MySql.Data.MySqlClient.MySqlPool.CreateNewPooledConnection()
at MySql.Data.MySqlClient.MySqlPool.GetPooledConnection()
at MySql.Data.MySqlClient.MySqlPool.TryToGetDriver()
at MySql.Data.MySqlClient.MySqlPool.GetConnection()
at MySql.Data.MySqlClient.MySqlConnection.Open()
at Devolutions.RemoteDesktopManager.Business.DataSources.DatabaseConnectionDataSource.GetData(String sql, IDbDataParameter[] parameters)
at Devolutions.RemoteDesktopManager.Business.DataSources.MySQLConnectionDataSource.GetDataSourceSettings()
at Devolutions.RemoteDesktopManager.Managers.ConnectionManager.LoadDataSourceSettingsFromDataSource(BaseConnectionDataSource newDataSource)