That's it all fixed, and an update is there and ready to go. To get the update, just go into the download link I sent you, and there should be a folder called UPDATE 20-03-19. In here is a new bytecode file - just copy that over the one in the media folder where the world builder was extracted to.
This update should be far more stable and addresses all the issues raised so far:
• Fixed bug when editing out of bounds of the world
• Fixed shadows and empty world at right and top most boundaries
• Added basic tooltips
• Fixed object editing bug
• Fixed game mode not hiding interface correctly
• Fixed interface text overlapping
• Added additional help text
• Fixes to prompt boxes
• Added option for 1st / 3rd person mode in game preview
• Fixed /keyboard mouse controls in game preview
• Fixed camera so distant objects stay visible (better ranging)
• Fixed so sounds stop when exiting game mode
• Fixed keyboard controls not working in game mode when joypad unplugged
• landscape painting across chunks fixed – seamless across chunks now
• Fixed saving and file path directory naming
• Fixed bug requiring an empty folder at first save
• grass generation fixed
• fixed tooltips in grass generation interface