My encyclopedia says the Protestant Reformation began in 1517, which puts it 94 years before the KJV's appearance (1611). Lots of Reformation history prior to the KJV. No, the KJV did not "usher in" the Reformation.
Martin Luther posted 95 theses On October 31, 1517. The KJV came in 1611.
Nothing like facts to correct an anachronism