Thanks for sending the file in. The texture mapping controls you need are in the Mac WIP however there isn’t a user interface for them so you’ll need to type the commands. Use ApplyPlanarMapping and follow the prompts to assign a planar mapping widget to any selection. You’ll need to make a plane with two clicks representing the image size and projection direction. To resize the mapping use the command MappingWidget to turn on the mapping widget for editing. MappingWidgetOff turns it off. You may also want to use MatchMapping to make an object in the same orientation as another have the same texture scale. I’m specifically thinking about planar mapping here as a case where I’d use MatchMapping.
I hope this helps and in the future, please use the Export command to send just the objects in question rather than the whole model if you can, this will make the upload much less likely to fail.
@marlin Can the UI for the Texture Mapping section of Object Props be exposed?