Use this guideline. Installation of Crossfire 2.0 for win8.1 by NucNuc Some basics for introduct - Pastebin.comThis gives a detailed instruction manual on how exactly to install Crossfire 2.0 on Windows 8.1. Unfortunately, for you, you screwed up and have to uninstall the crossfire installer, Freelancer, and FLMM, then follow the guideline, to make sure the game will be fully stable. It's long, but a reliable process. It worked for me, and I use Win 8.1. Just be sure to keep retrying the install…