Fixed an issue where "Drag & Drop" in options did not deselect when selecting a wrong cell; added right-click support.

Moved the "HELP" section from Options to "Support."

Updated the "Mark Errors in Red" feature: In addition to "None" or "5 times," you can now choose from None, 1, 3, or 5 times.

Added "Show Logical Cells" to the Support menu.