Download the free evaluation copy here.
This zip file is password protected.
Please send an email to support@glassengineersystem.com with you contact formation. A password will be sent to you later to evaluate GE-System.
For the evaluation copy, you can input many glass components, but only three of them are effective to calculate no more than 11(instead of more than 150) glass properties, while in the purchased version there is no such limitations.