Launcher for the Delphi IDE that decides which of multiple IDEs to launch based on the name and contents of the file passed to it. It supports .dproj, .dpr, .dpk, .bdsproj, .bdsgroup and .groupproj files.
If everything else fails, try to guess the BDS/Delphi version from the .groupproj filename. This Works for names like UnitTestsGrp_BDS2009, UnitTestsGrp_D2009, UnitTestsGrp_Delphi2009 or UnitTestsGrp_RS2009.
