What I do to get 32 and 64-bit flash player for windows:
2. Install Flash player of both 32 bit and 64 bit Windows machine. I use 32-bit flash player for 32-bit version of our app and 64-bit version for 64-bit app
3. Open Windows/System32/Macromed/Flash folder, copy pepflash...dll and manifest files from there and place them in PepperFlash subfolder in the apps folder