Execute CreateKeys.reg before installing the downloaded software.

CreateKeys.reg will create keys in your registry required by some installers of downloaded Rabbit software.

Upon executing CreateKeys.reg, a Registry Editor message will appear "Are you sure you want to add the information in...". 
Answer Yes.
Another message will appear to inform you that the information has been successfully added to the registry.
Hit OK.

The installer of the downloaded software can now find any of the keys in the registry that it may require.

