will this somehow cause glitch with my current saved file? I am currently at Ch1 and investigating inside Vale of Shadows.. I don't want to remove saved file to have 0 glitch after installing the IWD patch.. If patch won't cause any glitch, can I just install Heart of Winter and HOW patch on top of that? I'm asking this because I had terrible glitches playing IWD with HOW installation.. ofc I had no patch back then.