I have been using Sibelius professional version 5.1 for many years now, and have a large collection of .sib files that I would like to access. My old laptop internal HDD has failed. Fortunately, all my .sib files were saved on an external HDD, and are accessible top my new Windows 10 laptop. I still have the Sibelius 5.0 and 5.1 discs, and serial number starting SCEP 500 followed by 12 numbers.
Please advise how I can load this onto my new Windows 10 laptop.