I have just bought the latest version of 3DC Pro a few days ago and think I found a bug.

I can not move on the Y axis while trying to move a object in the iso view. The X and Z axis move just fine but not the Y axis.
That's forward and backward, left and right, but not up and down.

Thanks,
Rick

I think you'll find that is how it is designed.

Try Tools/View selection to divide up your screen into 2 or 4 iso views to give the full 3D freedoms.

There is also an option on the menu to remove the top caption to give more screen space.