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.
So all you have to do is run a ps script through run command plugin.
Here is the powershell script:
Script file zip: