We are currently running Professional but are wanting to try the trial of Premium to see if it will be useful for us. my question is will this effect my Professional, in any way? I have projects i am working on in Professional and cant take the risk of it messing up, if we decide not to upgrade after the trial.

2nd question, we have 4 users that use Professional, but only one of us needs the 3d capability, can a file created in Premium be opended by Pro, and vise versa?