Thanks for [WayBack] Are you familiar with “forgotten” hints? Here is a very rough example how to make them disappear without restarting the IDE… – Attila Kovacs – Google+
The code is centered around enumerating all windows of class TDesignerHintWindow and closing them.
These Windows happen to me a lot more in Galileo based IDEs than the classic Delphi < 8 ones.
–jeroen