Please note this will delete any previously downloaded content and custom user kits.
MAC:
To uninstall ARCADE you'll need to manually delete the ARCADE plugin file in each plugin directory. Here are the 4 folders in which you'll find an ARCADE file:
/Library/Audio/Plug-Ins/Components/Arcade.component
/Library/Audio/Plug-Ins/VST/Arcade.vst
/Library/Audio/Plug-Ins/VST3/Arcade.vst3
/Library/Application Support/Avid/Audio/Plug-Ins/Arcade.aax
Next, you'll need to delete the ARCADE content folder located here:
/Library/Application Support/Output/Arcade
PC:
First, please run the uninstaller that comes bundled with the installer here:
Control Panel (win7) or Settings WIN10 -> Programs and Features -> Select Arcade from the list and uninstall
Also please delete the Arcade folder in this hidden* location:
C:\ProgramData\Output\Arcade
Note* To access hidden folders please check out this guide: Access Hidden Folders
At this point you'll have fully uninstalled the program.