Winsizer

I downloaded Winsizer 2, now when I try to use it I get the message the instance I’m using is old, would I like to wait to replace it, after answering yes, it just disappears not to return, I am trying to delete it and can’t get something about two instances open at once, went on Google and everything was outdated or my computer did not have what I was to click on.I have Win 10 (New upgrade) 32 Ram i7. I can’t get rid of this thing. T.I.A…

Un-install it via ‘add remove programs’ or the ‘Microsoft store’ if that was the source?
You also might want to check in task manager, and make sure it isn’t set to autorun when the PC starts.