Can you get a new test game started up, or does the same thing happen?
Have you cleared the five top level cache files on your TS3 user game folder in Documents? Many of us do this routinely to avoid stale cache-related issues, the files do not clean up after themselves.
The issue could possibly be with your TS3 user game folder. Try pulling it out of Documents entirely, to the Desktop for safekeeping. A new user game folder will spawn to take its place on the next attempted launch, with no added content at all. Can you get a new test game to launch on the clean game folder?
