I have looked for a way to do this with no success.
I (unfortunately) researched the Industrial Complex. Now every time the damn game hiccups, all my Manufacturing Centers want to upgrade. This is an immense game and I have over 100 planets and taking those out of the build queues take a lot of time.
This happens if the game crashes, it happened when I agreed to a Peace Treaty and sometimes if I just Alt-Tab back to windows.
I do not want the ICs as there incremental cost is not worth the benefit - 6bc/turn for 10mp with a MC vs. 10bc/turn for 12mp with the IC unless the square has a bonus. This is a ToA game.
Any help would be appreciated. I simply cannot believe you cannot block this.