Update 4 does not require a new license key. It uses your existing TIA Portal V13 Floating or Single licenses managed via the Automation License Manager (ALM) .
: The update focuses on enhancing the performance and stability of the TIA Portal. This includes faster loading times for projects, more efficient handling of large-scale configurations, and reduced likelihood of software crashes. Update 4 does not require a new license key
While V13 SP1 Update 4 brought critical stability milestones to industrial networks when it released, managing this version requires a solid understanding of its deployment, features, and modern upgrade paths. Key Improvements in V13 SP1 Update 4 more efficient handling of large-scale configurations