Ok i have the same problem where i open sapien and it closes.
I have the debug thing i cant seem to find that editor file and i cant find that normal tag i need.
Debug says:

05.02.09 12:25:53 sapien pc 01.00.00.0609 ----------------------------------------------
05.02.09 12:25:53 reference function: _write_to_error_file
05.02.09 12:25:53 reference address: 401b13
05.02.09 12:25:53 Couldn't read map file './sapienbeta.map'
05.02.09 12:25:55 CreateDevice succeeded with refresh rate = 0
05.02.09 12:25:56 Sound card doesn't meet minimum hardware requirements. Disabling hardware option.
05.02.09 12:25:57 file_open('tags\ui\editor\markers\normal\normal.gbxmodel') error 0x00000003 'The system cannot find the path specified. '
05.02.09 12:25:57 couldn't open gbxmodel tag 'normal.gbxmodel'.
05.02.09 12:25:57 EAX: 0x0012F2EC
05.02.09 12:25:57 EBX: 0x706C6101
05.02.09 12:25:57 ECX: 0x0012F35D
05.02.09 12:25:57 EDX: 0x0012F324
05.02.09 12:25:57 EDI: 0x0012F2D8
05.02.09 12:25:57 ESI: 0x00000000
05.02.09 12:25:57 EBP: 0x0012F1B0
05.02.09 12:25:57 ESP: 0x0012F1A0
05.02.09 12:25:57 EIP: 0x7C90E4F4, C3 8D A4 24 ?????
05.02.09 12:25:57 EXCEPTION halt in .\editor_renderer.cpp,#189: marker.model_index!=NONE