This has happened to people on a few of the cryptos (in general strange sporatic upgrade errors).

If it totally doesnt work, you can go to the website and install it from there, that worked better for me when I was having trouble with PokerPlex.

Carribean Sun (whatever it's called) worked fine for me though.

I think the Green color isnt too bad, it's easy on the eyes. It will be interesting to see if the chip amounts clash with the watermark like the old site did. (that happened with PokerPlex as well until they changed the text color to black to fix it)