Welcome to the Quilting Board!
At this coming March TOGA in Turlock, I'm going to bring my Singer 328k in treadle, and Bernie is planning to bring his Singer 412G in treadle. You should bring your Singer 319w in treadle. It would be interesting to see how differently they all treadle. I'm sure if I treadled your 319, I would then be on the hunt for one afterwards.
If that doesn't work, I can't help ya. My son is the computer nerd that comes to my rescue when I can't get things to work. He has never read a computer manual. I don't now how he does it. And, I don't remember a computer manual coming with him on the day I gave birth to him.
I did just that - i can't dig up the right tool after I click on the image. DH doesn't have a clue either.
NEVER LET A SEWING MACHINE
KNOW YOU ARE IN A HURRY