I played golf right handed and used to put right handed playing on a 2 handicap, I stopped smoking and got the yips overnight and could not sink a putt of 6 inches. In 6 months my handicap increased by 6 shots, I started smoking again and the yips went away overnight and I ended up back on a 2 handicap after 3 months.
Finally I stopped smoking about 5 years later and the same thing happened (massive yip overnight). After 3 years of no smoking and trying everything to counter the yips, I had almost given up playing because I was averaging eight 3 putts a round.
One day I picked up my wife's putter (she plays left handed) and had a few putts, lo and behold no yip. I putt with a right handed grip but putt left handed, which is effectively a conventional right hand low left handed putting stroke.
I have done this for 5 years now without any hint of a yip and returned to playing on a 2 - 3 handicap. I have always used a line on the ball for alignment, so when I started left handed putting distance control is really the only thing I had to learn.
I cannot recommend this more as a potential solution to the yips for those of you who suffer from them.
I regularly play with a right-handed golfer who putts left handed with an old bullseye putter from 15 feet and closer and then uses the other side to putt right handed for longer putts.