Purchased Brush Packs into Painter 2018

I have many brush packs (31) I purchased from Corel.  They are unzipped and I saved the .exe file but I can't get them to install to Painter 2018.  This is an issue and Corel should provide a quick method to install brushes from previous versions.  In the meantime, how do I get them installed to Painter 2018?  Thanks!