If you have the DVD version, the key is usually on a sticker on the back of the manual or inside the case. Common Activation Issues on Windows 10/11
Historically, Eagle Dynamics provided more activations if you ran out, but as the product is now "Legacy," support is limited. Where to Find Your Key flaming cliffs 2 activation key
You get the same planes (F-15C, Su-27, A-10A, etc.) but with 64-bit support and high-fidelity flight models. If you have the DVD version, the key
If you upgrade your CPU, GPU, or reinstall Windows without deactivating first, you lose one activation. If you have the DVD version
Most keys came with 3 to 5 "activations."