Unfortunately, the evaluation version of Measurement Studio is not upgradeable to a release version simply by using a valid serial number. So, you will have to obtain the actual release version installation CD. A CD will be sent to you automatically if you purchased version 8.0 with SSP. If you purchased 8.0 without SSP, you can request that a CD be sent to you. If you have not purchased 8.0, you will need to purchase 8.0.1 (or upgrade to 8.0.1 if you have a prior version). This is described in this post:
http://forums.ni.com/ni/board/message?board.id=232&message.id=3305The problem you are seeing with the evaluation version reporting that it is expired is a known issue that we are in the process of fixing. There is a workaround, described in this post:
http://forums.ni.com/ni/board/message?board.id=232&message.id=3525#M3525Please let us know if you have any more questions.