Experiencing a weird bug when editing a perk tree: I had deleted all the perks from it, then added my own. At first I only added one perk (make sure it was working and so on) and with that one perk in the tree it seemed fine. However, once I added new perks to the tree it became some kind of horrible nightmare. The tier-boxes (0, 25, 50, 75, and 100) will no longer automatically expand to meet the new dimensions of the tree, instead they are stuck in the narrowest configuration possible. In game, the perk tree is unusable: there are weird artifacts stretched out into all the nearby skills, and it's impossible to select anything but the single starting perk, and it's hard to even see anything. Also, the "stars and nebula" background completely vanishes.

Any help? Anyway to just reset the changes to the perk tree?