The reason you most likely can't see the servers is because its being blocked, your internet / computer doesn't allows FreestyleGunz connection saying it noobletways.
Either you have to disable your firewall and antivirus as said above, or you should think of what you have changed on your computer / internet before the servers disappeared on your list and redo that if possible.
Reinstalling wouldn't make anysense to me, but it might work if you don't know what your doing.
