May be it can seems stupid, but actually on the free version of Spriter all of this functions was able. After I bought a pro edition I can't do anything with that)))
Firstly, what I have tested was a "save as a resized project" function. Actually, I did not like a massive sprite which occupied all the scene in Construct 2 so by that I tried to reduce the effect and also improve performance. It hanged the project, so when I opened it again in Spriter there were only bones with extremely small rewrited sprites.
The second is that I can't import the project now, I don't know why. When i'm trying to import something in C2 from Spriter there are two options: 1)it hang the C2 process; 2) it is imported divided.
Help me please with that, I don't know where I'm wrong!