unknown_uTox_XP

This is another unknown verion of uTox.exe, which is compatible with Windows XP.
I did found this on my HDD, and cann't understand what version this is.
No any source code, but this is standalone executable, and this is portable.
This "uTox_winXP.exe" supporting calls, and video-calls. File-profile name is "utox_save",
and maybe DHT there is more optimized, than "wintox.exe".

See "What is this.txt" with detail description.