Adding to @David Goldwasser's answer: since the new default report is available in measure form on the BCL, you could edit the os_lib_reporting.rb file (in the resources folder of the measure) to remove all the instances where the measure converts a value from SI to IP with OpenStudio::convert*, and then run your edited measure from the measures tab. See this page for more information on the built-in unit conversion.

*among other changes you might have to make.