How to uninstall intellij idea on... - Stack Overflow
If you want to keep your settings for later, you can either use them with another instance, another version, or anotherIDE if you remove your instance.If you're sure you won't need those directories, you can remove them.
Click the uninstall button if you want to uninstall the IntelliJ IDEA app.
The procedure for uninstalling programs may be different depending on the version of Windows you have.You can manually run uninstall.exe in the installation directory.