Nclink — Onecnc
Also, pro tip: If you get "Line count error," check your % symbols at the start/end of the post. NCLink is picky about that.
I just started using to send programs to my older Fadal (no USB, obviously). I used to use a laptop with Cimco Edit, but I like how NCLink sits right inside the OneCNC interface. onecnc nclink
If you use OneCNC, just use NCLink. It's more reliable than generic free DNC software. Also, pro tip: If you get "Line count