Stop what you're doing right now! Hands in the air!
On a more serious note, I recently replied to another user with the following messages (modified for you):
Here's another suggestion: When you see the welcome message, before clicking on anything, download and run Process Explorer. Double-click on Taiga, and then take a screenshot of the Image tab. See if there's anything odd with the paths.
I'd really like to fix this, but I'm almost as clueless as you are. Sorry. In the meantime, you can at least take a backup of your