Ok this is getting old..

[Kumae]

It seems everytime they do an "upgrade" such as this Vista compatability client, I get errors. My latest one is after downloading the latest patch my launcher comes up with an error, this one just says launcher.exe has encountered an error and must be shut down or some crap like that. This was after it downloaded and installed the patch but instead of logging into the game it just disappeared....

[Kumae]

hmmm ok nevermind it suddenly decided to work, odd.

[StalePopcorn]

I think this was mentioned on another thread, can't remember where - but the launcher itself needs to upgrade, so the first time you run it it installs the new launcher then exits without starting the game. The next time you run it, Istaria should launch correctly. Might be why it just disappeared.