why do you use v3.3 and not v3.6? ... it a free update!
i have not checked which version got support for D7000 but there is a good chance the D7000 is not supported by v3.3
but then im not a nikon shooter and i don´t have much of a clue what nikon camera is supported in which LR version ... anyway i would update to v3.6.
edit: i just checked and v3.3 added support for the D7000.
but v3.4 got some bugfix for the D7000. so i would definately update to v3.6.