I upgraded 2014 to 2015. Apparently you cannot just move the templates, they must be exported from 2014 and then imported to 2015. The two versions cannot share the same template directory. Doing this caused me to have to uninstall Sage 2015 completely, then reinstall. However, even after that, the export/import still does not work. These are consolidated reports using the Connector, so not sure if that may be the reason others are not reporting these issues. But I caution everyone not to think you can just upgrade this with no issues.