The ARES Commander 2013 Service Pack 1 (build no. 2013.2.28) setup under Windows 64-Bit has a problem with the registration of the preview DLL. A drawing preview is missing in the open dialog. We will fix this issue in the next service pack, below is a workaround to overcome this issue:

1. Run CMD.exe shell as Administrator
2. Go into to installation folder under  C:\Program Files\Graebert GmbH\ARES Commander Edition 2013\BIN-folder
3. Type "regsvr32 FxVistaPreview.dll" and confirm the upcoming dialog box.

--> The preview should be displayed again.