Can anyone tell me how to down load 64 bit of opensees?

[zzcivil]

I want to learn the source code of opensees,but i don't know how to down load the source of opensees. And my computer system is 64 bit of windows7,so i should 64 bit of opensees,Can anyone tell me how to down load 64 bit of opensees? Thank you.

[fmk]

you can use either the 32 or 64bit version of OpenSees .. i suggest 64bit .. you need to install both tcl and OpenSees. the links are on the download page.
http://opensees.berkeley.edu/OpenSees/user/download.php