Update feature always downloads 32 bit version

I have Windows Vista 64 and today I saw there was an update from the Update feature in SmartFTP, then I pressed download and when he tried installing gave an error saying I need to download 64 bit version.

So I assume the update feature is not checking whetever I have 32 bit or 64 bit version and always downloads 32 bit. Should be an easy one to fix.