Big Business 14.70 fixes checkboxes on Windows that display one letter unexpectedly.
Pictured, Windows 11 in the background shows the letter Z for Zap next to the checkbox for Use Custom Zap Gremlins (removes unwanted characters from exports).
Meanwhile, the macOS Sonoma version of the Company card in the foreground shows the checkbox without the unexpected Z. Both work correctly. One just resizes oddly.