I am glad that You like this effect. I saw You found original application of effect. +1
You are absolutely right. The algorithm of version 1.1 is changed in comparison with the previous version. I need some time to try to consider transparency.
I updated effect to version 1.1. I hope it will be useful. Now you can find it in the Effects menu and Artistic submenu.
Я обновил эффект до версии 1.1. Надеюсь он окажется полезным. Теперь вы можете найти его в меню Эффекты, подменю Художественные.
No, in paint.NET you can't change the text, it should be created again. For this reason it is recommended to type the text in a separate layer with a transparent background.
Usually .PSD file created in PhotoShop.
In Paint.NET once you have completed typing text, it becomes an image. Edit the text in the future is not possible, only to type it again. It doesn't depend on a plug-in in any way.