title: Cygwin setup.exe reverts to older GCC version
body: <p>I've installed GCC 4.5.0-1 under Cygwin, but now every time I run setup.exe, the "New" fields for all the GCC components are set to 4.3.4-4. If I proceed to install any other package, GCC 4.5.0-1 will be uninstalled and replaced with GCC 4.3.4-4.</p>
  
  <p>To avoid this, for each setup.exe session, I have to find the 8 or so GCC packages and click them back round to "Keep". Is there a way to avoid this?</p>