Many automation departments keep physical archives. A legitimate used copy of WinCC Flexible 2008 SP2 or SP3 on DVD can be purchased from industrial liquidators (be careful: reselling licenses is legally grey). The DVD contains the full installer; you simply need a valid license key.
Even with a legitimate WinCC flexible download, you will encounter issues. Here are the top three: wincc flexible download
💡 : WinCC Flexible 2008 SP5 is the recommended version for most users, as it includes the last major fixes and improved Windows 10 support. Many automation departments keep physical archives
Siemens provides an function in TIA Portal. You can directly open a WinCC Flexible 2008/2007 project and migrate it to TIA Portal. The migration tool will: wincc flexible download