Version numbers of software like 13.1.0.78 typically indicate the major, minor, build, and revision numbers. This detailed versioning helps in identifying specific updates, bug fixes, and features included in that release. For users and organizations, keeping track of the version is crucial for support, compatibility, and security reasons.
If you want, I can instead:
Quest offers several editions of Toad to match specific professional needs: Toad for Oracle 2018 Edition 13.1.0.78 Key