I have what most experienced Blender users would most likely consider to a minor problem, but to me, a nearly blind old man with numerous health issues who knows almost nothing about Blender, this is a real show stopper. All I about it is how to set up an Add-on named Blender2SCS, which sets up the program to allow importing, editing and exporting of SCS Software models from Euro Truck Simulator 2. In the game are various companies where the player gets jobs, picking up and delivering cargo in semi trailers. Once properly set up, the extent of my ability is to import company sign models and export them for use as other company signs.
Here's the problem I have. I'm getting very twitchy in my old age. I had just opened a sign model and I twitched, a particularly big one, and I hit the keyboard and the sign model I was preparing to export disappeared. I thought I must have closed it and went to re-open it. Everything seems normal when I open the program, select my Operator Preset, etc. But no matter what model I open, the work area in Blender is all text, which is so small I can't read it. Normally, I would copy it and put it in my text editor and see what it says, but it won't let me copy it. Looking at a zoomed in screenshot of it, I can see it is Python code.
I have no idea what changed or how to set it back to displaying models again. If anyone knows about whatever mode this is and could tell me how to set back the way it was before, I would greatly appreciate it. I know I could install the latest version and start over, but it's possible that Blender2SCS won't be supported in it (it's no longer in development) and I would have to revert back to 2.78c again, so I wanted to see if anyone could tell me what happened and how to undo it first.
PS; I did not know what kind of tag this required, and your page for listing them isn't available. So I chose "modeling", even though it may not apply. It wouldn't let me use "settings".