Hey sutthisan- Welcome to the forum! QuoteCenter (QC) is designed for compatibility with MS 9.1. I'm not sure about whether or not you could use the data in earlier releases of MS. It is confusing- the terminology. There is a QC appliciation AND a QC datafeed. The two are completely different. The QC application is a stand alone app that supplies access to many things not found in MS. To the best of my knowledge, it does require the QC datafeed to work. On the other hand, the QC datafeed is a separate creature. It supplies data to MS as well. It is not dependent on the QC application. i.e., you can run MS using the datafeed and not even use the QC application at all. In this case, it seems possible to utilize it in any RT version of MS, but I haven't tried it. That might be a question for support if you plan on sticking with earlier versions of MS. However, you might want to zap an email over to sales 'sales@equis.com' and see what kind of a deal they'd give you to upgrade to 9.1. Over the holidays, there were some incredible deals being offered.