Correct name is "Crossfire Mod 2.0 Client Edition" - maybe you extracted Crossfire20setup.exe to FLMM or something.Which version is shown when you start Freelancer ? Correct install is explained in https://swat-portal.com/forum/index.php/wcf/faq/#faqEntry-18
Nope, but you don't need it after CF 2.0 Mod install - I think you missed to run Crossfire20setup.exe from your download folder.If you put Crossfire20setup.exe or unzipped in FLMM folder please move all to download folder and run Crossfire20setup.exe from there.
Overwriting Freelancer.exe is not the way to go. It's a special Launcher for updates and options. It will be updated on first launch.Your nocd version won't work with CF 2.0 (and you don't need it) Edit: Fix the font Crossfire2 font didn't install (Solved manually)
Can be incompatible savegames from your \Documents\My Games\Freelancer\Accts\SinglePlayer folder. Make a copy of your games and put them in ex a subfolder. Then cleanup this folder.hth