This is highly recommended that you don't use this unless you need it very much.
There is another way, that is using an ahk executable to perform this action, but some av programs flag them as (false) positive. So I was trying to find a solution when I stumbled upon this one.
But not everything is perfect. This one will be slower than ahk one.
And also this won't bring the skin to focus on mouse over once you click on some other skin. That's just how Rainmeter works.
I get window handle from title, which changes to the skin you focus on or load or refresh. I will find a better way to make this work if possible.
So all you have to do is run a ps script through run command plugin.