smooth change to 1.0?

I'm using .22. Will I have issues changing to 1.0 if I use:

#include NewSoftSerial.h
#include "LedControl.h"
(for MAX7219)

Or have you all had smooth lovely transitions to 1.0?
I'm scared to change in the middle of multiple projects.

Just put the 1.0 IDE in a new folder. I've got 0018 thru 1.0 in seperate folders.

smooth change to 1.0?

No.