Now I trying it from the Tar package provided. I've already extracted the file and and copied the trelby folder to /opt/trelby/ successfully, albeit as a drag and drop as an administrator, however whenever I hit the command /opt/trelby/src/trelby.py or in cd into the /opt/trelby/src/ and try to execute trelby.py (./trelby.py, I'm assuming) it claims that the file doesn't exist.
This open source icon is named "trelby" and is licensed under the open source GPL v2 license. It's a colored icon. It's available to be downloaded in SVG and PNG formats (available in 256, 512, 1024 and 2048 PNG sizes).
It's part of the icon set "Ardis Icon Theme", which has 1,161 icons in it.
If you need this icon available in another format, it should be pretty straight forward to download it as an SVG image file, and then import it into apps like Figma, Fotor, Illustrator or Stencil. Converting it to an ICO, JPEG or WebP image format or file type should also be pretty simple (we hope to add that feature to Iconduck soon).