[U2 stands for update 2, f stands for... fixed... because I uploaded wrong zip file]
Featuring bug fixes, such as:
[*] Game glitched after losing a wave
[*] Idling heavies on normal
[!] There is still a bug when sounds, decals and death marks are still on the map after game restart / changing waves
Visual improvements:
[*] Fixed gates
[*] Changed transition between two buildings (near bots spawn)
Pop file changes
[now I hope thats the right one]