It seems WordPress’ auto correcting form caused some glitches in Fidelizer Pro purchase options. It’s now resolved and you can purchase Fidelizer Pro license now.
I apologize for the error happened during purchase offer. If you purchased Fidelizer Plus because you couldn’t purchase Pro version before, you may purchase “From Plus to Pro” option at $25.0 USD which has the same price as discounted Pro version. 🙂