What exactly do you do ?
If I understand correctly, you ar ecreating a new project, but leave the dialog open.
Now you open a cbp-file (e.g. by double-clicking it in the filemanager), so that it should open in the same instance of C::B, but C::B crashes immediately without generating a *.rpt file (the file should be in the folder where the crashed executable is).
I tried these steps on linux and it works without crash.
I will try to reproduce on windows later.