^^ Yes, I'm talking about the blue door. It appears I also lost the railings I put in the observation deck towers that hang out over the flight deck--so another thing to be redone.
Ah. It's hard to tell in your render but it looks like you have a blue door and a single gray door? In the episode there is a blue door, and two sets of gray doors and it is about thickness of the red marking on the floor.
I've searched everywhere including the trash. It's nowhere to be found. So this will be a step-by-step reconstruction from a given point. Mind you it will allow me to tweak a few things I wasn't completely happy with before.
I think part of the problem I'm beginning to run into is my computer is bumping into limitations in terms of processor. SketchUp itself is a single core program and maybe my i7 2600S 2.8GHz is struggling with very complex models such as this hangar with shuttlecraft (with interior). It can't be RAM of which I have 32GB. And I have plenty of storage (332GB of 500GB SSD avaialable).
I'm not sure, but I might have had this happen once before many years ago. It might be a case of a misplaced file, but I built a 3D model of the 1930's Flash Gordon rocketship, with full interior, and that model also seems to have disappeared.
Not sure if you're aware of this but sketchup has a recovery folder that might still have your file (replace username with yours). But it might not be there since you're updating it again.
C:\Users\UserName\AppData\Local\Temp\SKETCHUP