I need some help recoloring nieghborhood objects.

I have SimPE in Advanced mode and I opened object workshop and selected one of the terrain objects (The concrete square) and I got all the way to where I save the file. After I save it, and before I can recolor it, the program freezes. This has happened several times.

I close SimPE and click on the file and open it. Then I recolor it from there.
After I have it completely recolored and saved, i put it in my downloads folder.

But in-game, it shows up as the plain concrete texture.

Any ideas what I can do?

The impression I've got is that neighbourhood objects can only be cloned to recolour presently. Please tell me if I'm wrong on that.