SERENA SOFTWARE THIS week updated its StarTool application development suite for IBM mainframes, adding an applications performance manager and an upgraded file manager. The Applications Performance Manager determines how software is using system resources such as I/O. Serena’s File and Data Manager 7.3 makes it easier for users to access a database and pull out files from DB2 or VSAM databases, according to the company. Version 7.3 also provides direct integration with Serena ChangeMan ZMF, enabling users to view the change history of an application. Software DevelopmentTechnology IndustrySmall and Medium Business