The Archiver unit exists in Right Web Monitor Pro version only.
The Archiver unit is an additional program component which is intended for changed document versions archive maintenance. The Archiver uses MS ADO to store\read information, however the very document copies are stored in external files in Snapshots subfolder of program folder. By default it uses Microsoft.Jet.OLEDB.4.0 database engine (you can change it by editing HKEY_CURRENT_USER\Software\RightSoft\Right Web Monitor Pro\DBProvStr string value). You can enable\disable Archiver by adjusting "Options > General > Enable Archiver" option.
To set the program to store document copies please select its link in the Links view, go to Link properties, open "Actions" page and mark on "Save document copies when changed" checkbox. Now every time the program detects changes in document it stores its copy in the Snapshots folder.
To view document copies archive please select the link and select "Links > View Document copies archive" main menu item.