Are you trying to open a project with the xml extension in BAS? Probably your project is damaged, you did not edit it manually using text editors? Try to restore it from backups located here:
C:\Users\User\AppData\Roaming\BrowserAutomationStudio\projectbackups
@allister Hi, this is bug, it happens only if update column of int type. It was fixed, new version will be available in Thursday(8 November), if it is urgent for you, I can make a separate build.