When upgrading Toad(Toad for Oracle Subscription), the new version is installed in addition to the existing version, which is not automatically uninstalled. As a result, the same license is used on the same machine for two Toad installations belonging to the same user.
This behavior creates a potential licensing compliance issue that originates from the Quest installer itself, which indicates that it is upgrading the product but leaves multiple versions installed and actively using the same license.