Im having a similar problem, except Im able to play scarlet just fine.
Whenever I try to install Violet i get the error "Software could not start"
Downloaded from two seperate reputable sources, and both give me the same error. Once again, I've converted the XCI files using the exact same keys as I did for Scarlet.
Scarlet works fine, Violet will not start despite multiple deletes and reinstalls.
Any thoughts, advice or help would be appreciated!