Designer 1.2 can run side-by-side with Designer 1.1.2 if they are installed in separate locations. However on Windows, if you install Designer 1.2 on top of Designer 1.1, rolling back can be an issue. We will have this corrected for Preview 2.

To roll back your Preview 1 installation, follow these steps:

  1. Run the Designer 1.2 uninstaller to fully uninstall all 1.2 related files
  2. Delete your Designer installation folder, e.g., C:\Program Files\ExtDesigner
  3. Run the Designer 1.1.2 installer to fully re-install Designer 1.1.2.
  4. Open up one of the locations depending on your version of Windows:
    • Windows XP: %USERPROFILE%\Local Settings\Application Data\Sencha, Inc\Sencha Designer
    • Windows Vista & 7: %LOCALAPPDATA%\Sencha, Inc\Sencha Designer
  5. Delete the following files from that location:
    • libion-1.2.0.dll
    • xds-1.2.0.ion


We will prevent this from occurring in any Previews that are released between now and GA. However, we still recommend installing Designer 1.2 into a separate location from where Designer 1.1.2 is installed.

Thanks.