The proper way to remove AppCode depends on the method you used to install it.
Uninstall using the Toolbox App
If you installed AppCode using the Toolbox App, do the following:
Open the Toolbox App, click the screw nut icon for the necessary instance, and select Uninstall.
Uninstall a standalone instance
If you are running a standalone AppCode instance, the IDE configuration and system directories are preserved when you remove your instance in case you want to keep your settings for later or to use them with another instance, another version, or another IDE. You can remove those directories if you are sure you won't need them.
Delete the AppCode application in the Applications directory.
Remove the following directories:
- ~/Library/Application Support/JetBrains/<product><version>
- ~/Library/Application Support/JetBrains/AppCode2020.3