I think this is your Enscape window up in the top left:
How it got that small I don't know but can you try resizing it, if that fails then double clicking on it (should make it full screen)
As you seem to be the only one suffering this problem I'm guessing its something on your end and not Enscape.
In the past I've had apps do something similar, what happens is that the position and size of a window is stored in the registry and the values can get corrupted. This results in Windows positioning the window at 0,0 and with a size of 0,0 (or as small as it can get) .... This looks like exactly what's happing to you going by your screen shot.
If you're comfortable exploring the registry you'll probably be able to find and adjust the settings.
As I said I've seen this before with other apps so I'd happily put money on it being a Windows and not an Enscape problem.