Hi designcat,
Single menu and header bar have never been free options – what version do you have where it said it was free?
I can confirm this by going through all the changelogs, past versions code etc. etc.
You can confirm this by rolling back to the old version – whereas you may have been able to enter values in there (which you shouldnt of been able to in any free version) these wouldnt have had any effect on your site.
I would urge you to take a second look – are you sure you didnt unknowingly have the pro version installed before and are you sure entering those settings in an old version were actually having an effect.
I can provide plenty of proof that header bar and single menu have always been pro features.
Im happy to look into this with you as Im very confused as to how you could even enter these details in before in any version (which version are you upgrading from?)
All the best