Compuware Corp. CEO Chris O'Malley talks with Crain's Senior Editor Chad Livengood about how the information technology company has reinvented itself over the past five years since spinning off several divisions of its business and returning to its roots of developing software for mainframe computers, which remain the mainstay of IT operations for banks, airlines and insurance companies. Compuware remains based in the former Compuware Building (now called One Campus Martius), the headquarters of Quicken Loans.