Not according to the manual. Looks like it should be under Menu, Settings, Installer level, installation configuration. Page 10 of the manual.I've gone into the installer mode but can't see the Room Control Mod you mention. Is it under another name?
Others are correct- you'll need the installers back to sort the reverse circulation problem. A thought for you and them- the cheapest and least disruptive way out of that problem may be to fit WiFi or similar TRVs to all radiators (Vaillant have their Ambisense range, check with them but they ought to coexist with the Sensohome). Of course these things aren't free and of course the builder should cover the cost if he can't rectify the reverse circ problem properly any other way.
Did the builders son complete the commissioning info on the boiler?- if yes then you could wave Gas Safe at him as a threat if he can't or won't fix the problems