Back up your keybinds before uninstalling.You are downloading from the FD servers directly. Some people have reported issues with this ever since ED launched. In that case I personally recommend using the Steam servers instead (it is also MUCH faster for many people who can use the FD launcher!). You can find the instructions here:
In your case I kinda suspect there is some file corruption that is affecting both the game and the updater. If you dont want to use Steam, I suggest competely uninstalling ED and re-installing from scratch. I've had this happen with other games as well and this usually fixes it as well, clumsy as it is. Sorry to hear about your struggles!