Hi Neil,
indeed the "1.3" is just a version number for the CD-ROM packaging but it is not very meaningful. You should always look at the kits versions, like you said: Ride7 and RKitARM. You can upgrade one kit without needing to upgrade the other ones.
If you want to make sure Ride7 and associated kits are up to date, you should check the official Ride7 download site. The CD-ROM image provided on this website may be more recent than your CD-ROM, but it is not guaranteed to include the latest versions. Here is the official Ride7 download page:
http://www.raisonance.com/download/inde … tive=RIDE7
regards,
Lionel