Freshy 2 – cannot change sidebar width

Hi there,
I am just setting up the Freshy 2 theme.
After I had for a couple of days 2 sidebars, I decided to get rid of the left one. Instead I wanted to make the right sidebar a bit wider, changing the width in the options. But nothing happens, the sidebar stays the same as before.

Thanks for your help
Best regards from southern Spain
Jürgen