The uninstallers typically do not wipe out your blockchain directory.
The size of the actual executables (couple of MB) are minuscule compared to the blockchain (100GB+).
You need to find out where your blockchain data lived. The standard location depends on your OS, but is close to your wallet file, so if you know where to find your wallet, you should have no problem finding it.
There are blocks/ and chainstate/ folders which you should be able to delete. Back up your wallet.dat if it contains anything you might want to access in future.