Exactly. You just need a properly installed copy of RoF (plus mods, skins, maps you may have downloaded). Log in with your RoF account and you'll be back where you were.
You can even try to copy your old RoF directory, but be sure to use "repair" option in launcher, to install necessary libraries.
If above does not work and you have problems downloading new copy, remember that steam RoF exists, works exactly the same and uses more friendly download mechanism.
Deputy Staffelführer, Jasta 2 ''Boelcke'' http://jasta2.org
“Now now,” Akua chided. “Personal attacks are the mark of failed argument. If you’ve no counterpoint to offer, such flailing only serves to shed further light on your incompetence.”