My whole model disappeared/the screen is blank...?

Glad you got it sorted. I’ll trust you on it.

FWIW, there’s a ton of unused stuff that should be purged from the file. This is what I got rid of.
Screenshot%20-%209_14_2019%20%2C%203_46_50%20PM

It opened as a Sketchup 2017 file but your profile says you are using SU2019. Which one are you really using?

Thanks Dave, I’ll purge it. I am using SU2019 free trial at the moment, I was working with 2017 on that file.