In this FileZilla announcement comment:
John mentions that "Today's release of FileZilla Portable 3.66.1 makes use of the new PA.c Installer feature allowing the end user to select either 64-bit Only or DualMode with 64-bit and 32-bit support."
When I upgraded FileZilla to v3.66.1, I did not see that dialog box. So I tried uninstalling FileZilla and then reinstalling it. I still did not see that dialog box.
When does that dialog box appear?
(Using PortableApps Launcher v220.127.116.11)