Trying to redeem online some of my Upgrade e-vouchers on M&M website for travel on SWISS but the function is not giving the old screen which you insert all the data and then do the upgrade online. It shows only LH flight details and displaying PNR details.

Is that function is not working any more online or is there a special way to do that online instead of calling the M&M center ? If it is so how I can do it ?