Hfss For Windows 7 64 Bit

Hello everyone, I recently got a new computer with a Q6600 (Quad core2duo) and 4GB of ram. I have Windows XP Professional 64-bit installed. It is my understanding that HFSS 11 auto-detects whether or not you have a 64-bit OS and CPU. When I run HFSS, however, it has HFSS.exe*32 under processes in the taskbar, indicating HFSS is running as a 32-bit application.

Does this mean I am still limited to the 32-bit RAM limit of about 3.3GB? Perhaps it can still address all 4GB of memory, but parts are 32bit? I bought this PC so I can get upgrade to 8GB of ram if necessary, but if HFSS 11 can't use it and is still running in 32-bit mode, the extra memory is useless.

Do I need to do something special to install the 64-bit version? If it helps, I DID complete a simulation (passed through krylov vectors and completed fully) with about 114k tetrahedra. Throw Softball Faster. I think the 32bit limit is somewhere around 70k-96k tetrahedra, so is it possible that HFSS is running correctly? Kamov Ka-50 Alphasim For Fs9 & Fsx there. I will note that I am still somewhat new to HFSS, and have been using for about 4 months. Thanks for any help! I think you are OK.