Welcome to FT and to the EK Forum

A word of advice. You might want to remove your email address from your profile under your handle. Despite the many, many great people on FlyerTalk, there are also a few whose motives aren't so pure. And unless you want be bombarded by every spammer on the web, you might want to do this sooner rather than later.

I've never heard of an "options voucher". Normally though, if you don't complete your booked itinerary, the airline will cancel the rest of your ticket. The specific fare conditions will determine whether or not the remainder of the ticket has any value.