Older versions of Big Business can crash on macOS Sonoma. Pictured is Big Business 12 which crashes on Ventura and Sonoma and should not be used in the new systems.
Crashes put your data at risk. This solution is here to be found in a search and tell you to revert. Do not ignore these crashes especially if you Big Business Client is crashing.
Starting your Mac while holding Shift-Option-Command-R may offer to reinstall the original operating system for your computer if you accidentally ran Software Update.