Can't Install Rhino 6 to a new drive

I had Rhino 6 installed on a portable SSD, but when traveling I forgot the SSD and I need to use Rhino and when trying to install it the Installer says Rhino is installed and I can’t uninstall it because the Installer says the drive is missing. I tried deleting every Rhino/McNeel related Folder I could find on my laptop’s local drive but I can’t get the Installer to understand that I don’t have Rhino installation on my computer. How to fix this?

Ok now the Uninstall option in the Installer worked, it didn’t previously.