I tested the newly added Lexica Botania GUI scale button, but even with the first click the GUI expanded beyond my screen size. Now that button is off screen and unable to be reached to reduce GUI size again. Sadly the GUI size doesn't seem to be stored anywhere accessible to reset it to normal size so now I'm stuck and unable to use the Lexica Botania anymore.

It's not actually offscreen, it is on the same spot as it would be on normal scale, try clicking where it was before.

Can someone make a screenshot of the GUI so I at least have a CLUE as to where to click?

Never mind. Got it.

For anyone else getting into the same Situation:
From the exact center of the screen, head south half way to the bottom of the screen and move about half an inch to the left. You should find the button around that position.

EDIT: Actually, if you start from the bottom (at the very right edge of the armor or health bar) and go up to about the middle between the bottom screen and the center of the screen you should easily find the button).

PS: A GUI reset command would be smart...

What's your screen resolution?

1366 x 768 px (widescreen laptop)

Default scale was fine, I just was too curious for my own good to click that button.