I recently installed Windows Mixed Reality, OpenXR,SteamVR to support the HP Reverb G2 I purchased.   It was a pretty easy process getting it all working.

I flew a dozen flights, over about eight hours, all over San Diego to Burbank.  The G2 VR world was fantastic and very immersive.  I was so pleased!

Then uninstalled all the Reshade 4.9.1 stuff I had used in 2D flight sim for the last year.  After I used the Reshade unistaller - I could no longer load FlightSim 1.21.13.0 - just got a black screen with all the appropriate sounds.

I asked Steam to verify the file integrity and it found 1 error and said it would reacquire the file.

Now - when I start Flight Sim the Installation Manager Says: "Select additional content you want to install now or choose later in the marketplace" and shows a picture of the Standard Content package with MANDATORY UPDATE over the image and 126.78GiB as the data volume.

Is there any way to avoid this huge download?

How did unistalling Reshade (it was just a .dll and a texture and shaders file) cause me all this grief?

Do not ever verify on steam. That's the nuclear option. the second you click verify, you were doomed. It will always prompt to reinstall everything.

Good to Know - but not in time!

If in the Steam version there is a Official/OneStore folder, are you able to point the Installation Manager there? There's the bulk of the sim, it should verify its integrity and then start normal without installing anything.

2 hours ago, TacomaSailor said:

Is there any way to avoid this huge download?

When you get to the screen that says it wants to download 127 GB of files, look at the bottom right of the screen. There should be a "Browse" button. Click that and point it to wherever you have the main installation located. Should be the folder that contains the folders "Community" and "Official".

...jim