If you have saved the file from within the LV 7.0 evaluation version then you will only be able to take the VIs back by one version to LV6.1. It sounds like you want to take them back to LV6.0, unfortunately LV 7.0 is not able to do this. If you still have a copy of LV 6.1 then get LV 7.0 to save to LV 6.1, then use you LV 6.1 copy to save back to 6.0. Please be aware that LV will try to make the correct backward steps but there is no guarantee that it will be 100% successful. Like most software tools this method is not recommended, NI tries had to make LV as fexiable with the confindes of what it physically possible.
Kind Regards
Joe W
(NI)