Highligting Entiy

I have just downloaded 2018 64 Draftsight and I can't customize Element Colors per help instruction.

My default colors - blue for selection highlighting and orange for preview highlighting. I can't change them. When I go to Options- System Options- Display-Element Colors there is no Dynamic Highlight or Selected Entity listed within my Element Colors list. Also there is no Use dashed entity selection option.

Anybody can help?