Not a problem. It’s probably a wise idea to make sure it’s showing up under the installed plugins tab (Window > Plugins > Installed within the Editor). Then, assuming you have Substance files (.sbsar), you’ll be able to import them into the content browser.
If you don’t have them, you’ll be able to create them through Substance Designer and Substance Painter. I believe Allegorithmic also supply some samples for free on their site, however. So, might be worth checking those out 
I have all of there programs…Just not sure how to use them in a workflow yet…