Xbox PC Xbox Pc Where's My Dlc On Pc?

After weeks of searching here an elsewhere I can't seem to find the solution to this issue of mine. I finally have a small break from my Train Engineering studies and wanted to supplement my sim time at the training center with this sim, and well, nothing.

It worked weeks ago, I could see my purchased content. Then, poof, gone. I've tried reinstalling the base game and then the DLC, and still nothing. I know it's downloaded because I can see it (DLC folder Northeast Corridor- New York Penn - Trenton) on my HD, that sits outside the main game folder. Xbox PC app also shows this as downloaded (check marked as installed) Launching the game also shows this as owned and installed. So why can't I see this to play?