Category 'CoDeSys 2.3 Converter' has been removed Starting from PLC Designer V3.22 no projects of the tools 'Drive PLC Developer Studio' and 'PLC Designer V2.x' can be opened and saved in the format of 'PLC Desinger V3.x'.
Category 'SmartCoding'
Option 'Declare unknown variables automatically (AutoDeclare)' / 'Enable for ST editor'. If these two options are active, then the dialog 'Auto Declare' is opened automatically when an unknown variable is entered in the ST editor. With this dialog the variable can be declared as already in older PLC Designer versions.