Complex sentence: In March 2012, Wix launched a new HTML5 site builder, replacing the Adobe Flash technology; existing sites built in Flash were still supported, but all new customers were directed to the new HTML5 platform.
Split into simpler sentences: In March 2012, Wix launched a new HTML5 site builder, replacing the Adobe Flash technology. Existing sites built in Flash continued to be supported, but all new customers were directed to the new HTML5 platform.