SWTOR crashed and wants to download from scratch.

Oki doki, this is really starting to annoy the * out of me. (excuse the language, but i've had these problems since the launch of the game.)

Here i was playing peacefully for a few hours, untill i get to Tatooine. There it crashed saying it had a C12 error (whatever that is). So i tried to repair the game by deleting the xfr and config folder from bitraider to force verify it. When i opened the launcher, it wanted me to download 80% of the game again.

Oh and not to mention, i spent the last 3 days downloading this silly excuse for a game.  (Cause Aussie net is terrible.)

So my question is, how do i revert it back to its playable state WITHOUT downloading the game again?

Slighty off topic: When i was ingame, the damn GTN wouldnt work on any toon i was on (Yes i'm a sub).

Tried every option to search, came up with no results and it wouldnt let me sell anything either, like it wouldnt even let me put the item into the box to set the price.