Did you actually *read *the post you quoted? :dubious:
Louis XVI decided to call a new Estates-General (the first in 175 years) to discuss new tax policy because the American adventure had been such a strain on his treasury; sensible idea, but then it got out of hand.
If the American Revolution is put down before the French invest a lot of money in it, then the French Revolution is averted or at least delayed, and, being delayed, almost certainly plays out differently; either way, the whole course of European history plays out differently.