If the fonts that you purchased have the option of the BX file extension then you can bring them in and use them in Embrilliance Express Free. This program allows you to type your fonts into the free program and is a basic program. If you want to spend some money you can purchase the Embrilliance Essentials program which allows you to do a bit more with BX files.
I have purchased fonts from Designs By Juju and she always offers her fonts with the option of the BX file extension. Apparently other designers do the same. Designs By Juju includes a text file with her fonts that will link you directly to the free Embrilliance Express program. If you need to find out how to use the free version have a look at this video on YouTube made by Designs By Juju
https://www.youtube.com/watch?v=E0yOg6OzIxI