The Vda6.3 Analysis Tool saves data automatically in the browser database on each change in a field. Modern applications need the browsers history to save data.
This functionality was extensively tested with all browsers. If you have problems please check the security settings of your browser.
The Internet Explorer offers the function "Delete browser history on closing" you can find this in the IE Settings on the first page. This option has to be deactivated otherwise you have to backup your data after every usage.
If you still have problems please add a question for additional support!