Yes, I used the beta of patch 6 to delay patch 7, but it was done with a rollback operaion, so patch 7 got installed, I noticed it broke some mods, then reinstalled the game from the patch 6 branch. It would be nicer to avoid upgrading and then regressing back, by not upgrading in the first place.
Oh..yeah, I see why you would want to avoid that! Offline mode and auto-updates off is the best option then.