We are working on getting this fixed ASAP this morning and it shouldn't take too long. Even better, we are working on it so it should never happen again!
Sorry for the inconvenience,
*Edit, fix has been deployed. Please let us know if you are still having issues installing.
Still having issues here with the web version (Europe/Netherlands), download took an hour but succeed but starting a hunt is impossible, as soon as I press "Start Game" I get the message "An error occured, game already running, Please see the support section for more information"...but it is not running, the only thing I see is a black screen....
What left for me is installing the game on Steam and hope that that will work....or in other words, day 2 that TH can not been played..
EDIT: installing the game on Steam went faster then I thought and..........it works