Discord's old icons

You can find Discord's icons from before the rebrand here
Discord Stable/PTB
Discord Development
Discord Canary

Changing icons is easy, but if you don't know how, here is a quick tutorial.

1. Right click on the Discord icon and select Properties

2. Click on "Change Icon"

3. Click on "Browse"

4. Point to the icon you just downloaded

5. Click OK, and Apply/OK.