I can still see that option on your characters! Click on the links tab in the sidebar (on the left) of any character's page, or add /links to the end of the URL. Like this! Does that link work? Can you add characters to each other?
As for your HTML window, go into your settings (dropdown in the top right), click "Display Settings", and then hit "Turn WYSIWYG On". (at least I think that's what you're talking about, if it's not lemme know and I'll try to help!)