This dialog can be displayed to request parameters for the upcoming data merge/delete execution. The dialog is triggered by the Merge or Delete actions in the Data diff tab.
The Free version just warns about potential limitations:
If displayed, the dialog contains the following sections:
You're going to {merge or delete} one or more rows
Target database:
{Database display name}
Data merge and deletion does not make any backup, please make sure that you've done it yourself if needed.This warning can be suppressed with Don't warn me again option (in the Free version it is Don't warn me again in this AccdbMerge session because it can not be configured).
You've selected all rows on the current data page, but there are more rows on other pages.The Free version simply warns that only the current page will be processed:
Do you want to process all rows from all pages?
You've selected all rows on the current data page, but there are more rows on other pages which are not going to be processed.
The default settings for Backup and Merge all pages sections can be configured in the Settings dialog under the Data Diff tab. This dialog also provides the option to specify whether to prompt for these parameters during each merge/delete action or to use the default settings automatically.