By this window you can backup your data (are saved the last three backups) and eventually, in case of loss of current data, restore data from the last backup. The data of AS3 are stored in Access databases, and in case of problems you can anyhow retrieve some important data by the Access program, or an Access reader.

Some data stored in the databases can be important: make frequent backups. It is recommended to make a new backup expecially before to update AS3 to a new version.

You can backup the program data at any time, even selecting different backup folders. Are saved the last three backups (eg nast.dbx, nast (1) .dbx and nast (2) .dbx), so if you want to recover an old backup (ex the penultimate) you can open the folder and:

• rename at will the file of the last backup (eg nast.dbx ===> nast(100) .dbx)
• rename nast(1).dbx ===> nast.dbx

During the data recovery of the last backup you can choose in a appropriate window which data to recover and which not.

Note: Despite the .dbx suffix, AS3 databases are simple Microsoft Office Access ones, and can be opened and checked without problems with that program or with an Access reader.