ADMB-IDE 11.2 is available for 32 and 64 bit Windows:
http://ftp.admb-project.org/admb-11.2/admb-ide-112-win32.exe
http://ftp.admb-project.org/admb-11.2/admb-ide-112-win32.zip
http://ftp.admb-project.org/admb-11.2/admb-ide-112-win64.exe
http://ftp.admb-project.org/admb-11.2/admb-ide-112-win64.zip

The main changes since ADMB-IDE 10.1 (LTS) are:
Updated components (ADMB 11.2, Emacs 24.4, GCC 4.9, GDB 7.8)
Safe compilation is now default (with new option -f for fast)
Supports contributed ADMB libraries (see ‘contrib’ directory)
Comes with additional Emacs packages (AUCTeX, ESS)