You don't say, PK, how long the saw was running on pure 4-star. However, nothing you can do about it now.
You are likely to have shortened the life of the saw's engine to some degree or another, but all you can do is use it (with your usual 2-stroke mix) and see how long the saw performs as you would like across the revs range.
It's a shame you misfueled, but just forget about and get on with it.