Hello,
Thank You for your question.
If you add new module you will break template, because it has a lot of custom HTML modules.
The same for menu items.
Of course, you can customize it as you need, but one page template not suitable for all changes. Adding new modules or menu broke structure of template. We have tried make as easy as possible. Better contact us through our contact form and ask about customization service (paid work).
Contact FORM:
ordasoft.com/About-us/OrdaSoft.html
Thanks,
Taras
OrdaSoft team.