Stephen Kelly, chief executive of legacy software specialist Micro Focus is to step down for personal reasons.The firm said a search for a successor will commence immediately, adding that Kelly will work with the board and the broader management team to ensure a smooth and well managed transition of his responsibilities.'I have been privileged and fortunate to have served Micro Focus for over three years. The timing and nature of these personal decisions is never easy - it will be sad for me to leave the company,' Kelly said in a statement.Micro Fous added that trading is line with its statement in August when it indicated that the first quarter was broadly in line with management expectations and predicted a running twelve-month revenue contribution of $150m from recent acquisitions Compuware and Borland.