I was rendering a scene, and knew one of the objects was no good. So I paused it before it reached the object, replaced the object with a new one, and continued rendering. A few minutes later TG crashed. So you can't do that, lesson learned (and perhaps it's quite logical).
What I also noticed that if you have an object in a tgd, and replace the object in your folder by another version with the same name (I changed wheels on a broken cart by higher poly wheels), TG actually loads (most of) the old settings and/or parts of the old object. It doesn't flush all parts and so on, so doesn't completely replace the object. I had to reload the new object by hand from within TG and dump the old one. Does that make sense?
And a third thing I noticed; if you resize tiff's with an alpha layer in Irfanview (was the quickest way, I usually don't use IV, but PS), the alpha layer gets lost. So don't! I ended up with square leaved ivy
