The program used to automatically insert the next check number, without me doing it manually, but has recently stopped. There is no "auto" button for me to select, so I am wondering how to restore this setting.
The only thing that you can do is to re-install the application because I couldn't find anything about it or a download possibility. In most of the cases, if an application refuses to run or has functionality errors, a simple reinstall will fix it.
The Just Checking application is still available if you need it to download on your PC. Use the following link to download it: https://www.justapps.com/download-checkbook-software-windows.html