CS 3 begins launching, but never posts menu bar in High Sierra
Having gone through the download process on the assumption that the license was the problem, I find that the newly installed AI CS3 still has the symptom it had before. That is it seems to start, but never displays the menu bar. I can also start it by double-clicking a .ai file. The graphic displays, but no menu bar or other windows.
CS3 is not supported on High Sierra.