1. You can edit a lower version template in higher version of TemplateToaster i.e you can open TemplateToaster version 4 generated template in TemplateToaster version 5 or 6 but once the template is edited with higher version you can not reopen that in lower version 4 again.
2.To have sidebar menu at right position, you can assign sidebar menu to right position after installing exported template within CMS. For more details please follow the steps provided below.
Go To TemplateToaster -> Select both sidebar layout -> Design Sidebar Menu as per your requirement.
After exporting template to specific CMS assign module/widget position right to sidebar menu module/widget
3. As currently TemplateToaster version 7 beta is in testing phase you may face any issue or query, our development team is working to make it more fast. Please feel free to contact us back for further queries.
Please open a support ticket at http://templatetoaster.com/support and provide some sidebar menu issue related screenshot so that we can provide you an appropriate solution.