Increase scale without crashing Unity?

My Unity project is a little over 1GB in size. I need to scale all of the models in the scene up (possibly by 100X). However, when I try to do this Unity becomes unresponsive.

Am I able to scale up the project via the command line? Or is there another way?
(The processor is an Intel Xeon and the machine has 8GB of RAM.)

I finally found a solution. The city model (FBX format) was initially scaled to 0.01 when I placed it in the scene. I merely changed the value to 1 in the Inspector for that object and then scaled every model (individually–yes it was tedious) up 100x. Its working just how I wanted now!