In Version 255 and Greater, the option to display a Pictorial Menu for Resources goes away.  We recommend that you as System Administrator go to the Corporate Settings on your existing Synergy and make sure that the Appearance is Textual.  Also make this value Mandatory.

You may have to discuss this with some Resources that have made the switch to a Pictorial View.  Their screens should change the next time they log into Synergy Enterprise.