Make sure that this version of FTPhoto is appropriate to your platform. Versions offered are:
Windows 7 SP 2 or better (32-bit and 64-bit versions)
Mac OS X/macOS 10.10.5 or better
Linux x86 (32-bit and 64-bit versions), tested on Ubuntu and Mint
Linux ARM (32-bit), tested on Pi OS.
Additional requirements:
High-speed internet connection.