Solved! Go to Solution.
I figured it out! If you lower-and-raise your screen resolution, the raster calculator expression box reappears! I went from 1920x1080 down to 1600x900 and it appeared, and when I went back to 1920x1080 it stayed there! I imagine I'll have to use this hack-solution every time I open arc, but I don't care! It worked for me!
Best Regards,
Dylan
EDIT: EVEN SIMPLER SOLUTION!! (Found by Juan Carlos Villar Calle below, see link >> ArcToolbox - Missing box - YouTube
1. Open up the raster calculator window with the missing expression box)
2. Hold down crtl + scroll your mouse wheel up until it appears! (it must be some issue with the resolution of your screen and resolution of the box... I have no idea... but it works!
3. DONE!!!
Best Regards,
Dylan
This actually worked for me too! Big thanks for the post!
Try this, I think it's just a window size problem. ArcToolbox - Missing box - YouTube