a k510 is appeared on emma, that means - phone is retail now.
i don't have that phone yet, but i looked at its firmwares and noticed that it is same as 810/530.
so, i think that you can use it with current setool2 version, selecting model as w810/z530.

all current flashes is on support, rest files is attached.

current version on support updated with new rest files too.

password for rest files is "fuckzulea"
k510rest_r4ch003.rar