Um, do we really have to reinstall if you go silver? I though you just could't use your gold character without the conversion thing so at worst you need to make a new character.
I took Admiral Kirk
's question to mean that he has a copy of the game, but does not currently have it installed on his computer. In that case, yes, he would need to install the game, update the launcher and download patches. Anyone else who already has the game installed will simply receive launcher and patch updates.