Genuine fcm64.dll files are digitally signed by Flexera Software or the application vendor (e.g., Autodesk). Right-click the DLL → Properties → Digital Signatures tab. A patched version will have or a broken one.
Some vendors (e.g., Serif Affinity, JetBrains) offer perpetual licenses for old versions at a fraction of the cost. You can legally buy an old license key on eBay or license resellers (be cautious of scams).
, ensure your version of the DLL matches your specific game build number exactly to avoid the "Initialization Error." troubleshoot specific error codes?