so anyone know how you can tell if you have the latest and greatest service pack installed? I see the request above but there is no answer, I too purchased the J41 about a month ago and assumed that the SP would have been included, but would love to know how you can find the what version one has installed to determine if the SP1 needs to be applied.Thanks in advanceJoe Porter

Joe, go to PMDG folder in Your FSX directory, there will be file called README_PMDG_JS4100.TXT, open this file, and in the header You will see the current version of Your product.Hope this helps.

Thanks very much and it looks like the update was included in the full installer when I purchased.