Hi Wally. I'm afraid you are on the wrong Board to be asking about Particle Shop. As far as I am aware, although it is made by Corel, it was developed as a plug-in for Adobe Photoshop. I don't even know if it will work with Corel PaintShop Pro -- though others here may have more information on that than I do.
I don't know if there is a separate forum for Particle Shop, though it is more likely to be in one of the Adobe forums, most likely that for Photoshop. It is not discussed on our own web board. Moreover, while we discuss some Corel products -- the multimedia ones you see listed here -- and use the Corel servers, we are not run by Corel. We are a user to user board staff by volunteers who are also users, not Corel employees, who give their time to try to help other users.
Hopefully someone else may be able to give you the address of a forum dealing with Particle Shop. The nearest Corel forum I can suggest is for Corel Painter
https://painterfactory.com/ That is because the particle technology used by Particle Shop was original developed in Painter. But you will need to register separately on that forum. And I can only repeat that I think it is more likely that Particle Shop will be discussed on an Adobe forum.