When i downloaded before STK always get downloaded the win32 version(my system is 32bits), now never get the 32bits version pressing download. To get the 32bits i have to get from files, go to the latest version and download the correct file.
I find aparently downloading STK are pushing win64 version in win32 system, perhaps by the same in the portable version only get the 64bits version of the app and have to replace with the 32bit app manually