IE10 -64 -32 major confusion.

I am running W7 Professional -64. MS updated IE9 to IE10 .. and IE10 no longer indicates -64 or -32.

I have iexplore.exe in the Program Files folder 757 KB (775,216 bytes) and another in the Program Files (x86) folder 752 KB (770,608 bytes).

I would ASSUME the first is 64-bit IE10 and the second is 32-bit IE10 .. but there is no evidence of that ... anywhere .. All Programs only shows one IE10 .. and there is no way I know of to tell which it is.

CAN IE10 be run in 32-bit mode on W7-64 and if so .. how? Conversely, can one ELECT to run IE10-64 and if so .. how?

thank you in advance. I have tried to find these answers for weeks and acchave not found a clear explanaion of this situation.