So earlier this morning I tried to figure out what was going on and tried to launch the 32 bit version from the Steam launcher. The game froze on the loading screen, and my taskbar froze as well, forcing me to do a standard hard restart. I restarted my PC, only to find to my horror that train simulator is now listed as "Uninstalled" in my Steam library. All my DLC is now listed as "Uninstalled" as well. Any attempts to launch it result in the game trying to start an initial install process.
WTF!!



Exiting Steam and reloading didn't fix the issue. If I try to start the game from the desktop icon, I get an initial dialogue box asking how I want to go about installing Train Simulator.
I don't see any path forward other than redownloading this entire game and reinstalling all my mods. Luckily I backed up my game folder not too long ago, so I'm not losing much work. But man, is this incredibly, incredibly, incredibly frustrating.
Does anyone have any insight?