PTR will show when you change the official / unofficial drop down menu, if you want to get back into the game before you downloaded you will have to change the properties in steam. See the image attached
Just had this also, downloaded a patch just over 3 gigs. Like GNIHAR said, go to the properties tab in steam for Atlas and set the drop down for BETAS to "NONE". Now I am re-downloading the game (4.3Gig).
Or just play on the PTR
game has started crashing so they are doing something at the backend, I only came here as I thought the subject header said wine, need more wine, starting to be able to read stuffs