chrome 64-bit updated to 32-bit

hello,

I've been running chrome portable 32-bit,
but I decided to try 64-bit,
so, I downloaded the paf file from sourceforge and installed over,
I updated the latest version from portableapps platform though and
I saw that my chrome portable reverted to 32-bit again,
why was that?

can't portableapps update 64-bit version of chrome?

or maybe it couldn't detect that this was the 64-bit version and
I have to do some manual modification in order to work?

thanks

edit: ok, I've read info here:
https://portableapps.com/apps/internet/google-chrome-portable-64