On Windows, you can access the registry directly using the registry editor.
To start the editor, select Start > Run and type in the Open box
regedt32
Read Only Mode protects your registry data from accidental changes. To use it, click Read Only Mode on the Options menu in the registry editor.
The Sybase IQ registry entry is held in the HKEY_LOCAL_MACHINE key, in the following location:
SOFTWARE Sybase Adaptive Server IQ