Photos (Jpg, Png-viewer) --- i don't like it because it launches sluggishly...

There is a  (Windows) tool called  Photos (Jpg, Png-viewer)  --- i don't like it
because it launches  sluggishly....
Esp. in the last 5 days or so, i'm noticing that almost every day
i have to go to Properties to  change it back to
my fav. Jpg, Png-viewer tool
because the Windows update (?) is  pushing  Photos  on me.
                           is there a Fix for this???
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