Currently it is not simple to change it but it is possible.
Close the IDE. Find the file named: project.pbxproj.template in B4i installation folder.
Edit the file and change line 240, from:
TARGETED_DEVICE_FAMILY = "1,2";
To:
TARGETED_DEVICE_FAMILY = "2";
#If Phon
#CustomBuildAction: 1, c:\windows\system32\cmd.exe, /c copy /Y "C:\Program Files (x86)\Anywhere Software\B4i\project.pbxproj.template_iphone" "C:\Program Files (x86)\Anywhere Software\B4i\project.pbxproj.template"
#End If
#If Pad
#CustomBuildAction: 1, c:\windows\system32\cmd.exe, /c copy /Y "C:\Program Files (x86)\Anywhere Software\B4i\project.pbxproj.template_ipad" "C:\Program Files (x86)\Anywhere Software\B4i\project.pbxproj.template"
#End If
You can post a feature request. I do not yet know which version will include this feature.For which version you planned it?