Downloading demigod help

So i'm new to impulse, but it seemed simple to me.  I clicked on games and it started downloading.  I was clicking on things and one thing i could do was hide the items in my games tab.  So i clicked that but when i decided i didnt want that, i click it again and i get an error saying impulse has to shut down.  When i restart impulse, my games tab is gone and im not sure how i can download demigod now...  Can someone please help?