When writing a windows registry key by using Global Config operation, if wrote value contains backslashes (i.e.: a windows path), "undo" operation is not properly executed and the key is not removed.

// @TargetDir@ = 'C:\Program Files\Publisher\App'
component.addOperation("GlobalConfig",
  "HKEY_CURRENT_USER\\Software\\@Publisher@\\@ProductName@",
  "lastInstallationPath",
  "@TargetDir@");