Update: Installing GIMP 2.7.3 in Windows

UPDATE-: I add this update to an earlier post on "How To Install GIMP 2.7.3 in Ubuntu and Windows.
I had issues with saving to the OpenRaster extension (.ora) and had to go back and forth between 2.7.3 and 2.6.11 (stable version).  I went and backed up my .gimp 2.7.3 folder and uninstalled Gimp 2.7.3 with RevoUninstaller.  Then I reinstalled it with the version I downloaded from Gimpusers.com HERE.  I verified that it worked by exporting as an .ora file.  Then I copied my themes and brushes into the new folder.  Not sure what happened, but it is an experimental version.

Hope this helps,