Dru's Ultra Patented Super Weird Way to Fix Discord™ (currently, I only know how this works on Windows. If you're on a Mac and figure out a way to fix this, I'm sure some people would love to hear it! I imagine the Mac equivalent of what I posted here would work.)
PS: this may not work, but it'll definitely purge all files that Discord put on your computer.
Step one: Completely close out of the malfuntioning Discord client
Step two: Uninstall the malfuntioning Discord client in Programs and Features
Step three: Open File Explorer