Go HERE and download Tone Studio (and any drivers you may require for you OS) to your PC, connect your amp to the PC (you will need one of those USB printer cables). You shold be able to find a bunch of Youtube videos that will walk you through the whole process.
Download patches, add them to Tone Studio, save to amp.
Alternatively, there are a few 3rd party apps, I use Katana Librarian, you will need a USB OTG compatible mobile device and the above cable. Much more convenient than using a PC.
Download patches, add them to the app, save to amp.