Same here. The mods in question were Construction Drones (v0.4.11 to 0.5.1) and Resource Spawner Overhaul (v6.0.7 to 6.0.8)

I played Factorio today after I updated to 0.17.44 yesterday without problems. After a while I closed the game without any problems. When I started the game right now via the desktop shortcut, I get the "Install Screen" from Steam because Factorio is not installed anymore. After reinstalli...