Member name	Value	Description
UseNewDraftAngleAnalysisUi	0	UseNewDraftAngleAnalysisUi bool Value, defaults to true
UseCompressionWhenSaving	1	Use compressed buffers when saving 3dm files. bool Value, defults to true
TestAdvancedString	2	String value, defaults to "test string"
TestAdvancedInt	3	Integer value, defaults 123
PdfOptionalContentGroups	4	How optional content should be included when exporting PDF files
LeaveFloatingPanelsHiddenOnMac	5	Bool value used on Mac to satisfy a user request to hide floating stuff when a command starts and leave it hidden when the command ends. This is false by default. https://mcneel.myjetbrains.com/youtrack/issue/RH-57945
DisableFileWatchers	6	Disable file watchers, using to diagnose Mac Rhino mystery crashes https://mcneel.myjetbrains.com/youtrack/issue/RH-52805
EnableCheckForUpdates	7	Auto check for update, enabled by default on Mac, does not show up in Windows https://mcneel.myjetbrains.com/youtrack/issue/RH-60427
LeftJustifyNumericText	8	This is mainly a issue on Windows, currently there are several different numeric controls scattered across the product and no consistent text alignment. This is an attempt to provide a way to control the preferred alignment style.
EnableWindowsGestures	9	https://mcneel.myjetbrains.com/youtrack/issue/RH-62173 Disable gestures for Windows views for a customer who was complaining when upgrading.
MakeInteriorNgonVertexesSelectable	10	Set this to false if you only want boundary vertexes selectable when you run PointsOn. https://mcneel.myjetbrains.com/youtrack/issue/RH-62140
MacDisplayOldVersionAutosaveWarning	11	Set this to true if you want to be warned about autosave for old file versions on Mac. https://mcneel.myjetbrains.com/youtrack/issue/RH-62359

Reference

Rhino.Runtime Namespace