Distinguishing 32bit and 64bit Versions

Hi there,

I help old people with older systems just as WinXP or WIN7 via USB stick to slower computers with limited resources that are just as old and of only 32-bit. Sometimes they´re even offline.

I must download 32-bit programs with my 64-bit notebook here and can´t use any automatic detection due to the fact that a accidentaly downloaded 64-bit version is then useless if transported to a 32-bit system.as a cuckoo egg and I have to repeat the same procedure as last year.

Let's say I need the last 32-bit version of firefoxESR portable 52 german how do I find it from here:

https://sourceforge.net/projects/portableapps/files/Mozilla%20Firefox%2C...

Even when I click on the Link there´s even no 32-bit or 64-bit information on the pop-up.
It asks me to download an unknown version just called

FirefoxPortableESR 52.8.0 German.paf.exe

I hope I explained my problem and apologise for my bad English as it´s not my native language,

best regards