there is no specific "Launcher 13" for Test Drive Unlimited 1 (TDU1) , the community widely uses the Project Paradise Launcher TDU Platinum
The Ultimate Guide to the Test Drive Unlimited 1 Offline Launcher v1.3 test drive unlimited 1 offline launcher 13
: If the game crashes with a reference to a missing or corrupt radial.cdi file, navigate to C:\ProgramData\Test Drive Unlimited\ . Delete the radial.cdi file found there. The game will automatically regenerate a working version upon the next launch. there is no specific "Launcher 13" for Test