No longer able to access some printing options (version7.7.3851.58, Win10Home64)

Whether printing by email preview or opening a PDF, whether directly or open menu, after selecting print OR hitting ctrl-P, I no longer have the old advanced menu button that let me choose whether to print one- or two-sided. There's a new link where the advanced options used to be that says "Print using system dialog" instead, and that doesn't give me the what-sided options either. Other browsers on my desktop remain unaffected.

Also occurs on new no-extension profile.