the uninstaller/modifier/updater has issues at least with AIS: if you wait a few seconds before confirming the changes the dialog window just disappears, or it doesn't, seems to do what you want, and in the end nothing was done. I've seen that a few times. Uninstalling completely is never an issue, it's when you want to add/remove components that problems come. Anyway everything works as expected after two or three tries.