You can't download GlazeChem anymore because the developer stopped the development and its availability for new users. He even posted registration data on the official website for users that still have the product.
Currently, the only way to obtain the software is to try to reach the developer using its email address. Send and email to this address to request a new download. Also, specify that you are an old user that needs the installation package.
Current email address: firstname.lastname@example.org