You shuld extract the download from C:\Program files... because of the windows right system. It could be that you(tortoiseSVN) are not allowed to change/files files there.
If someone tells you to clean up your dev1257 you right click on your dev1257 folder and do TortoiseSVN->Clean up...
After thus you can run SVN update again. You have to do this every time when you stopped the download manually.
To Import/Export a char go on Camp->Export/Import NPCs.->click the name you want->press c->statistics and the rest you do like with your own char.
If someone tells you to clean up your dev1257 you right click on your dev1257 folder and do TortoiseSVN->Clean up...
After thus you can run SVN update again. You have to do this every time when you stopped the download manually.
To Import/Export a char go on Camp->Export/Import NPCs.->click the name you want->press c->statistics and the rest you do like with your own char.