You install Update 4 on a clean install of Version 2.9. The upgrade path is:
Eplan Electric P8 Version 2.9 SP1 Update 4 X64 is a high-performance used for planning and designing machine and plant systems . Released as a critical maintenance update, it ensures stability, performance, and compatibility for 64-bit Windows environments. Key Features of Version 2.9 SP1 Eplan Electric P8 Version 2.9 Sp1 Update 4 X64
: This is a native x64 (64-bit) application, requiring compatible 64-bit operating systems and Microsoft Office environments if Access databases are used for parts management. Critical Dependency : Starting with Version 2.9, Microsoft .NET Framework 4.7.2 is required for operation. 2. Key Features of SP1 Update 4 You install Update 4 on a clean install of Version 2
: The layer management interface is a dockable dialog, meaning changes are saved automatically, making it easier to search for objects and edit attributes. Key Features of Version 2