TIA Portal V17, V18, and V19 include a "Step 7 Classic" migration tool. You can import S7-300 projects into TIA Portal (but not edit them in the Classic environment). This is useful for maintenance but not for native Step 7 engineering.
: If you already have a valid license for STEP 7 V5.6, you can download Service Pack 2 or the latest Hotfixes (such as Hotfix 10 ) free of charge to update your existing installation. siemens step 7 5.6 sp2 download