So, what do?
There are currently two ways to go about using smolicons.
Method 1: Click and Paste
Smolicons bypasses the middle man of your operating system's file browser/explorer/finder/etc., allowing you to paste the icon from your clipboard straight into your vector design document just by clicking on it.
Unfortunately, this method won't work on every design program. Alternatively, you can try Method 2.
Method 2: Download it
Suppose you happen to use a program or app that Method 1 doesn't support. In that case, alternatively, you can click on the button in the corner of each icon box to download the SVG file.
Method 3: SVG set
Method 4: As a font